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+*.7z filter=lfs diff=lfs merge=lfs -text
+*.arrow filter=lfs diff=lfs merge=lfs -text
+*.avro filter=lfs diff=lfs merge=lfs -text
+*.bin filter=lfs diff=lfs merge=lfs -text
+*.bz2 filter=lfs diff=lfs merge=lfs -text
+*.ckpt filter=lfs diff=lfs merge=lfs -text
+*.ftz filter=lfs diff=lfs merge=lfs -text
+*.gz filter=lfs diff=lfs merge=lfs -text
+*.h5 filter=lfs diff=lfs merge=lfs -text
+*.joblib filter=lfs diff=lfs merge=lfs -text
+*.lfs.* filter=lfs diff=lfs merge=lfs -text
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+*.msgpack filter=lfs diff=lfs merge=lfs -text
+*.npy filter=lfs diff=lfs merge=lfs -text
+*.npz filter=lfs diff=lfs merge=lfs -text
+*.onnx filter=lfs diff=lfs merge=lfs -text
+*.ot filter=lfs diff=lfs merge=lfs -text
+*.parquet filter=lfs diff=lfs merge=lfs -text
+*.pb filter=lfs diff=lfs merge=lfs -text
+*.pickle filter=lfs diff=lfs merge=lfs -text
+*.pkl filter=lfs diff=lfs merge=lfs -text
+*.pt filter=lfs diff=lfs merge=lfs -text
+*.pth filter=lfs diff=lfs merge=lfs -text
+*.rar filter=lfs diff=lfs merge=lfs -text
+*.safetensors filter=lfs diff=lfs merge=lfs -text
+saved_model/**/* filter=lfs diff=lfs merge=lfs -text
+*.tar.* filter=lfs diff=lfs merge=lfs -text
+*.tar filter=lfs diff=lfs merge=lfs -text
+*.tflite filter=lfs diff=lfs merge=lfs -text
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+*.zip filter=lfs diff=lfs merge=lfs -text
+*.zst filter=lfs diff=lfs merge=lfs -text
+*tfevents* filter=lfs diff=lfs merge=lfs -text
+# Audio files - uncompressed
+*.pcm filter=lfs diff=lfs merge=lfs -text
+*.sam filter=lfs diff=lfs merge=lfs -text
+*.raw filter=lfs diff=lfs merge=lfs -text
+# Audio files - compressed
+*.aac filter=lfs diff=lfs merge=lfs -text
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+*.jpg filter=lfs diff=lfs merge=lfs -text
+*.jpeg filter=lfs diff=lfs merge=lfs -text
+*.webp filter=lfs diff=lfs merge=lfs -text
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+*.mp4 filter=lfs diff=lfs merge=lfs -text
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diff --git a/benchmark/IOL/ioling_hf/README.md b/benchmark/IOL/ioling_hf/README.md
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+---
+license: cc-by-sa-4.0
+task_categories:
+- text-generation
+language:
+- en
+tags:
+- linguistics
+- olympiad
+- evaluation
+- reasoning
+pretty_name: IOLing
+size_categories:
+- 100<n<1K
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: train.parquet
+  - split: full
+    path: full.parquet
+- config_name: rl_manual_v1
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v1/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v1/validation.parquet
+- config_name: rl_manual_v7_concise
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v7_concise/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v7_concise/validation.parquet
+- config_name: rl_manual_v8_atomic
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v8_atomic/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v8_atomic/validation.parquet
+- config_name: rl_manual_v9_atomic_with_prior
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v9_atomic_with_prior/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v9_atomic_with_prior/validation.parquet
+- config_name: rl_manual_v10_expanded
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v10_expanded/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v10_expanded/validation.parquet
+- config_name: rl_manual_v11_clean_prompt
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v11_clean_prompt/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v11_clean_prompt/validation.parquet
+- config_name: rl_manual_v12_expanded_clean
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v12_expanded_clean/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v12_expanded_clean/validation.parquet
+- config_name: rl_manual_v13_expanded_clean
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v13_expanded_clean/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v13_expanded_clean/validation.parquet
+- config_name: rl_manual_v14_expanded_clean
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v14_expanded_clean/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v14_expanded_clean/validation.parquet
+- config_name: rl_manual_v15_expanded_clean
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v15_expanded_clean/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v15_expanded_clean/validation.parquet
+- config_name: rl_manual_v16_expanded_clean
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v16_expanded_clean/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v16_expanded_clean/validation.parquet
+- config_name: rl_manual_v17_expanded_clean
+  data_files:
+  - split: train
+    path: rl/ioling_qwen3_4b_manual_v17_expanded_clean/train.parquet
+  - split: validation
+    path: rl/ioling_qwen3_4b_manual_v17_expanded_clean/validation.parquet
+- config_name: rl_verified_microsteps_v1
+  data_files:
+  - split: train
+    path: rl/ioling_microsteps_v1/train.parquet
+  - split: validation
+    path: rl/ioling_microsteps_v1/validation.parquet
+- config_name: sft_selected_student_traces_v1
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v1/train.parquet
+- config_name: sft_selected_student_traces_v2
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v2/train.parquet
+- config_name: sft_selected_student_traces_v3_clean_prompt
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v3_clean_prompt/train.parquet
+- config_name: sft_selected_student_traces_v4_expanded_clean
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v4_expanded_clean/train.parquet
+- config_name: sft_rule_rich_traces_v1
+  data_files:
+  - split: train
+    path: sft/ioling_rule_rich_traces_v1/train.parquet
+- config_name: sft_selected_student_traces_v5_expanded_clean
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v5_expanded_clean/train.parquet
+- config_name: sft_rule_rich_traces_v2
+  data_files:
+  - split: train
+    path: sft/ioling_rule_rich_traces_v2/train.parquet
+- config_name: sft_selected_student_traces_v6_expanded_clean
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v6_expanded_clean/train.parquet
+- config_name: sft_selected_student_traces_v7_expanded_clean
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v7_expanded_clean/train.parquet
+- config_name: sft_selected_student_traces_v8_expanded_clean
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v8_expanded_clean/train.parquet
+- config_name: sft_selected_student_traces_v9_expanded_clean
+  data_files:
+  - split: train
+    path: sft/ioling_selected_student_traces_v9_expanded_clean/train.parquet
+- config_name: sft_rule_rich_traces_v3
+  data_files:
+  - split: train
+    path: sft/ioling_rule_rich_traces_v3/train.parquet
+- config_name: sft_verified_microsteps_v1
+  data_files:
+  - split: train
+    path: sft/ioling_microsteps_v1/train.parquet
+- config_name: sft_verified_microsteps_balanced_v2
+  data_files:
+  - split: train
+    path: sft/ioling_microsteps_and_selected_v2_balanced/train.parquet
+- config_name: sft_verified_distillation_v1
+  data_files:
+  - split: train
+    path: sft/ioling_verified_distillation_v1/train.parquet
+---
+
+# IOLing
+
+English International Linguistics Olympiad problem dataset built from the official
+IOL problem and solution PDFs at https://ioling.org/problems/by_year/.
+
+This release contains a provenance-rich full dataset, a text-extraction strict
+split, manual verification reports, and deterministic scoring utilities.
+
+## Files
+
+- `train.parquet`: text-extraction strict split, flattened for
+  `datasets.load_dataset("agurung/ioling")`. This split is useful for
+  evaluation experiments, but it is not manually cleared for RL/SFT labels.
+- `full.parquet`: complete solution-backed dataset, flattened with the same
+  columns as `train`.
+- `data/ioling_dataset.jsonl` / `.parquet`: full solution-backed dataset.
+- `data/ioling_dataset_text_strict.jsonl` / `.parquet`: high-confidence text
+  extraction subset recommended for text-only model evaluation.
+- `data/ioling_problem_only_gaps.jsonl`: official problem pages excluded from
+  strict evaluation because an English problem or official solution source was
+  unavailable.
+- `iolai_format/`: all records in an IOL-AI-like CSV layout.
+- `iolai_format_text_strict/`: strict split in the same CSV layout.
+- `reports/`: build summary and QA metadata.
+- `reports/index.html`: static dataset/evaluation dashboard.
+- `reports/manual_verification/`: source-level manual verification findings for
+  all 130 solution-backed source problems.
+- `reports/rl_training_summary.md`: local OpenRLHF smoke-run summary.
+- `data/ioling_rl_reward_candidates_manual_v1.jsonl`: manually PDF-checked
+  deterministic-RL candidate rows with strict keyed boxed-answer schemas.
+- `rl/ioling_qwen3_4b_manual_v1/`: OpenRLHF-ready v1 train/validation JSONL plus HF-loadable
+  parquet generated from manually checked rows.
+- `rl/ioling_qwen3_4b_manual_v7_concise/`: fresh concise v7 train/validation
+  split generated from the current 15-row manual candidate file. This is the
+  compound-subproblem baseline used by the current probes.
+- `rl/ioling_qwen3_4b_manual_v8_atomic/`: one manually checked answer unit per
+  task, preserving source-level train/validation separation.
+- `rl/ioling_qwen3_4b_manual_v9_atomic_with_prior/`: the same atomic targets,
+  with every earlier same-subpart target explicitly paired with its verified
+  answer. This is the preferred curriculum format for later-item experiments.
+- `rl/ioling_qwen3_4b_manual_v10_expanded/`: 61 train and 24 source-disjoint
+  validation tasks. It adds 23 targets transcribed and checked directly against
+  the official 2011 Nahuatl, 2021 Ekari, and 2023 Supyire problem and solution
+  pages.
+- `rl/ioling_qwen3_4b_manual_v11_clean_prompt/`: the same v10 tasks and labels
+  with a shorter reasoning instruction and strict keyed final-answer contract.
+  This is the clean-prompt predecessor.
+- `rl/ioling_qwen3_4b_manual_v12_expanded_clean/`: the previous expansion with
+  80 train tasks from 11 source problems and 24 validation tasks from three
+  disjoint sources.
+- `rl/ioling_qwen3_4b_manual_v13_expanded_clean/`: the previous expansion with
+  88 train tasks from 12 source problems and 24 validation tasks from three
+  disjoint sources.
+- `rl/ioling_qwen3_4b_manual_v14_expanded_clean/`: the current preferred
+  deterministic config. It has 123 train tasks from 15 source problems and 24
+  validation tasks from three disjoint sources, adding 35 manually checked
+  Kimbundu, Hakhun, and Terena targets.
+- `rl/ioling_qwen3_4b_manual_v15_expanded_clean/`: 146 train tasks from 17
+  source problems, adding 23 targets manually transcribed from the rendered
+  2006 Lakhota and Catalan problem and solution pages. The 24-task,
+  three-source validation split is unchanged.
+- `rl/ioling_qwen3_4b_manual_v16_expanded_clean/`: 155 train tasks from 18
+  source problems, adding 9 Micmac transcription and orthography targets
+  manually checked against the rendered 2008 problem and solution pages. The
+  v16 matched SFT checkpoint is retained as an evaluated research artifact, not
+  the selected model, because it did not improve held-out transfer.
+- `rl/ioling_qwen3_4b_manual_v17_expanded_clean/`: 167 train tasks from 19
+  source problems, adding 12 Creek stress tasks manually transcribed and
+  checked against rendered 2018 problem and solution pages. Raw source-disjoint
+  validation remains unchanged at 24 tasks.
+- `rl/*/*.parquet`: HF-loadable parquet generated from the JSONL. The JSONL
+  keeps nested `answer_units`; parquet uses JSON-encoded nested columns such as
+  `answer_units_json` for stable cross-split loading.
+- `sft/ioling_selected_student_traces_v1/`: 38 structured chat traces whose
+  final answers and reasoning were manually checked against target-specific
+  facts. This config covers only six source problems and is a small research
+  seed, not a general IOL solution corpus.
+- `sft/ioling_selected_student_traces_v2/`: 61 checked traces covering nine
+  training source problems. The v3 clean-prompt config has identical
+  completions and the preferred v11 prompt wording.
+- `sft/ioling_selected_student_traces_v4_expanded_clean/`: 80 checked traces
+  corresponding to the v12 training tasks.
+- `sft/ioling_rule_rich_traces_v1/`: 80 reference traces that put manually
+  reviewed official source rules before the target-specific derivation. Raw
+  input prompts are unchanged; the rules are completion supervision only.
+- `sft/ioling_selected_student_traces_v5_expanded_clean/`: 88 checked traces
+  corresponding to the v13 training tasks.
+- `sft/ioling_rule_rich_traces_v2/`: the 88-task v13 rule-rich supervision set.
+- `sft/ioling_selected_student_traces_v6_expanded_clean/`: 123 checked traces
+  corresponding to the v14 training tasks.
+- `sft/ioling_selected_student_traces_v7_expanded_clean/`: 146 checked traces
+  corresponding to the v15 training tasks, including the 23 new 2006 tasks.
+- `sft/ioling_selected_student_traces_v8_expanded_clean/`: 155 checked traces
+  corresponding to the v16 training tasks, including 9 new 2008 Micmac tasks.
+- `sft/ioling_selected_student_traces_v9_expanded_clean/`: 167 checked traces
+  corresponding to the v17 training tasks, including 12 new 2018 Creek tasks.
+- `sft/ioling_rule_rich_traces_v3/`: the 123-task v14 rule-rich supervision set.
+- `sft/ioling_structured_analysis_v1/`: 369 checked multitask rows over the 123
+  v14 training tasks: separate structured analysis, solving with checked
+  analysis, and raw solving. This is an experimental supervision config, not a
+  set of model-generated traces cleared for training.
+- `sft/ioling_microsteps_v1/`: 100 manually written, keyed intermediate tasks
+  over all 15 checked training sources.
+- `eval/ioling_validation_microsteps_v1.jsonl`: 40 source-disjoint intermediate
+  tasks transcribed from six rendered official solution pages.
+- `sft/ioling_microsteps_and_selected_v2_balanced/`: the experimental balanced
+  microstep/raw-solve SFT mixture. Repetition is explicit in `repeat_index` and
+  the summary; it is not hidden duplicate weighting.
+- `sft/ioling_verified_distillation_v1/`: 32 source-balanced raw-prompt
+  continuations: 12 guided student samples, 10 manually accepted
+  answer-conditioned reconstructions, and 10 concise manual derivations. Every
+  completion was reviewed; no privileged information appears in its prompt.
+- `rl/ioling_microsteps_v1/`: OpenRLHF-ready exact-reward train and validation
+  splits using the reviewed keyed microstep scorer.
+- `opd/qwen3_30b_teacher_targets_v1.{jsonl,parquet}`: sparse top-20 Qwen3-30B
+  distributions on 61 raw Qwen3-4B prefixes. The top tokens plus residual
+  bucket preserve 99.846% mean teacher mass for the documented cross-model OPD
+  diagnostic. These are privileged research targets, not evaluation inputs.
+- `reports/ioling_hint_diversity_summary.md`: hint/diversity and online
+  distillation probe summary.
+- `reports/focused_reasoning/index.html`: focused Qwen/Gemma prompting,
+  aggregation, GROOT, scoring-alias, and manual rationale-quality report.
+- `data/manual_overrides/focused_reasoning_trace_audit_v1.json`: sample-level
+  manual decisions for exact focused reasoning traces.
+- `data/manual_overrides/v14_transfer_and_scaffold_trace_audit.json`: strict
+  manual review of every exact v14 transfer and answer-conditioned trace.
+- `data/manual_overrides/v14_selected_sft_bootstrap_audit.json`: fresh-base and
+  two-epoch selected-trace SFT comparison, including manual review of all 17
+  exact source-seen samples across the full and one-per-source probes.
+- `data/manual_overrides/v14_rule_rich_and_opd_audit.json`: manual review of
+  every visible held-out final and every exact source-probe trace from the
+  low-LR rule-rich SFT and two direct on-policy distillation diagnostics.
+- `data/manual_overrides/structured_analysis_v1_audit.json`: manual review of
+  all 48 generated held-out analyses and every visible final from raw and
+  two-stage structured-analysis evaluation.
+- `data/manual_overrides/microstep_curriculum_v1_audit.json`: manual label,
+  scorer-equivalence, SFT, OpenRLHF, and output-level audit for the verified
+  microstep curriculum.
+- `data/manual_overrides/composition_scaffold_v1_audit.json`: sample-level
+  review of the target-specific privileged support gate, including 23 exact
+  answers, 13 accepted rationales, and all scorer corrections.
+- `data/manual_overrides/composition_opd_v1_audit.json`: data, training, W&B,
+  raw held-out, microstep, and manual-output audit for the 32-prefix selective
+  composition OPD pilot.
+- `data/manual_overrides/verified_distillation_v1_audit.json`: trace selection,
+  SFT settings, W&B runs, and manual review of all 192 raw outputs and all 47
+  scorer-positive microstep outputs from the verified-continuation pilot.
+- `data/manual_overrides/train_expansion_v15_audit.json`: rendered-PDF audit,
+  scorer checks, and matched-model results for the manually corrected 2006
+  Lakhota and Catalan expansion.
+- `data/manual_overrides/train_expansion_v16_audit.json`: rendered-PDF audit,
+  scorer checks, and matched-model results for the manually checked 2008
+  Micmac expansion.
+- `data/manual_overrides/scoring_overrides_v1.json`: reviewed unit-level case
+  and explicit semantic/format aliases; no fuzzy or model-judge reward.
+- `evals/results/`: optional smoke-test score files from local vLLM runs.
+- `docs/parse_examples.md`: parse examples from the generated dataset.
+- `docs/scoring.md`: deterministic scorer definition, model-judge interface,
+  and training-quality notes.
+- `docs/composition_distillation.md`: verified support gate, composition OPD,
+  and selected-continuation SFT results.
+
+## Counts
+
+- Full records: 555
+- Strict text records: 478
+- Source problems with official solution-backed records: 130
+- Strict text source problems: 111
+- Problem-only gaps: 4
+- RL reward candidates in this upload: 15
+- RL manual v1 train/validation rows: 9 / 6
+- RL manual v7 concise train/validation rows: 9 / 6
+- RL manual v8 atomic train/validation rows: 38 / 24
+- RL manual v9 atomic-with-prior train/validation rows: 38 / 24
+- RL manual v10 expanded train/validation rows: 61 / 24
+- RL manual v11 clean-prompt train/validation rows: 61 / 24
+- RL manual v12 expanded-clean train/validation rows: 80 / 24
+- RL manual v13 expanded-clean train/validation rows: 88 / 24
+- RL manual v14 expanded-clean train/validation rows: 123 / 24
+- RL manual v15 expanded-clean train/validation rows: 146 / 24
+- RL manual v16 expanded-clean train/validation rows: 155 / 24
+- RL manual v17 expanded-clean train/validation rows: 167 / 24
+- Full years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2021, 2022, 2023, 2024, 2025
+- Strict years: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2021, 2022, 2023, 2024, 2025
+
+Record types in the full dataset:
+
+```json
+{
+  "full_problem": 130,
+  "subproblem": 259,
+  "partial_variant": 166
+}
+```
+
+Record types in the strict text split:
+
+```json
+{
+  "full_problem": 111,
+  "subproblem": 223,
+  "partial_variant": 144
+}
+```
+
+## Record Types
+
+- `full_problem`: solve an entire IOL problem.
+- `subproblem`: solve a detected labeled subpart or assignment.
+- `partial_variant`: earlier subparts are shown solved; solve the later target.
+
+All solution-backed records include official solution provenance, source PDF
+URLs, PDF SHA-256 hashes, page ranges, canonical answer text, answer units, and
+verifier metadata.
+
+## Curation Notes
+
+Older IOL PDFs sometimes contain image-glyph text or broken font encodings.
+Those records are retained in the full dataset with
+`metadata.curation_status = "auto_extracted_needs_manual_review"`.
+A complete manual verification pass on 2026-06-30 covered all 130
+solution-backed source problems and found unresolved issues for every source,
+mostly answer-unit granularity plus a smaller set of prompt/canonical
+faithfulness defects. Each flattened row includes
+`manual_verification_status`, `manual_verification_worst_severity`,
+`manual_verification_issue_count`, `manual_verification_issue_fields`, and
+`training_readiness`.
+
+Use `ioling_dataset_text_strict.*` for text-only model comparison only with the
+manual verification report in mind. Do not treat the broad strict split as
+RL-ready or as a high-confidence SFT target set until the listed fixes are
+resolved and re-verified. For deterministic RL experiments, use the smaller
+`rl_manual_v1`, `rl_manual_v7_concise`, `rl_manual_v8_atomic`, or
+`rl_manual_v9_atomic_with_prior`, `rl_manual_v10_expanded`, or
+`rl_manual_v11_clean_prompt` config. The v7 concise split is
+regenerated from the current 15-row manual candidate file and excludes the
+quarantined Luwian glyph-image row from text-only RL. The manual candidate set's
+15 rows across
+9 source problems were
+compared directly with the official PDFs; it is a conservative seed set, not a
+claim that the broad 555-row corpus has been manually cleared. The Luwian
+hieroglyph row checked during review is quarantined from text-only RL until it
+has a faithful visual or manually encoded prompt representation.
+
+Raw PDFs are not redistributed in this dataset package. Records point back to
+the official IOL URLs.
+
+Local evaluation results use a conservative deterministic final-answer-only
+answer-unit scorer. They are included to exercise the dataset and runner, not as
+a leaderboard or reward-quality label source. See `docs/scoring.md` for the
+scorer definition and optional model-judge path.
+
+## Usage
+
+```python
+from datasets import load_dataset
+
+ds = load_dataset("agurung/ioling")
+strict_train = ds["train"]
+full = ds["full"]
+```
+
+The root splits are flattened for training/evaluation. Use files under `data/`
+when you need nested provenance and verifier metadata.
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diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/barcelona.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/barcelona.html
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@@ -0,0 +1,443 @@
+<HTML>
+<HEAD>
+</HEAD>
+<BODY LINK="#0000ff" VLINK="#800080" BGCOLOR="FFFFFF">
+
+<h1>Barcelona</h1>
+
+<p>An anonymous caller told us that this puzzle has to do with patterns (<a href="panel1.jpg">1</a>, <a href="panel2.jpg">2</a>, <a href="panel3.jpg">3</a>, <a href="panel4.jpg">4</a>) found in Building 56.</p>
+
+<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#000000" CELLPADDING=7 WIDTH=214>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
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+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
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+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+</TR>
+</TABLE>
+
+<P>&nbsp;</P>
+<P>&nbsp;</P>
+<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#000000" CELLPADDING=7 WIDTH=214>
+<TR><TD WIDTH="17%" VALIGN="TOP">&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
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+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
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+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
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+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
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+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
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+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+</TABLE>
+
+<P>&nbsp;</P>
+<P>&nbsp;</P>
+<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#000000" CELLPADDING=7 WIDTH=214>
+<TR><TD WIDTH="17%" VALIGN="TOP">&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
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+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0" >
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+</TABLE>
+
+<P>&nbsp;</P>
+<P>&nbsp;</P>
+<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#000000" CELLPADDING=7 WIDTH=214>
+<TR><TD WIDTH="17%" VALIGN="TOP">&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
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+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP"BGCOLOR="#c0c0c0" >
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0" >
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" >
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" BGCOLOR="#c0c0c0">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP"BGCOLOR="#000000">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP" >
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+<TR><TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+<TD WIDTH="17%" VALIGN="TOP">
+<P>&nbsp;</TD>
+</TR>
+</TABLE>
+
+<P><a href="solution.html">Solution</a></P>
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..a2206d8b7663e55ae8adeb6e9197f2a520f64aba
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Barcelona_barcelona.html/solution.html
@@ -0,0 +1,15 @@
+<html>
+<head>
+	<title>Barcelona: Solution</title>
+</head>
+
+<h1>Barcelona: Solution</h1>
+
+<p>Take the masks from the puzzle and apply them on top of to the wall panels (<a href="panel1.jpg">1</a>, <a href="panel2.jpg">2</a>, <a href="panel3.jpg">3</a>, <a href="panel4.jpg">4</a>) in Building 56. Black and grey from the puzzle cover the same square on the wall. White is transparent. As for the building 56 squares, most are grey, but anything with writing or pictures in it is considered black. </p>
+
+<img src="solution.jpg">
+
+<p>The solution is, therefore, <strong>DIN</strong>.</p>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/freetown.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/freetown.html
new file mode 100644
index 0000000000000000000000000000000000000000..0219dd3624fd6956e0c06b470f0e4003562b93e5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/freetown.html
@@ -0,0 +1,18 @@
+<html>
+<head></head>
+<body bgcolor="ffffff">
+
+<h1>Freetown</h1>
+
+<p>
+We received this strange set of objects dropped in a little bundle at
+ACME Headquarters. Try to figure out what it means. </p>
+
+<p>
+<i>Archivist's Note</i>: Print <a href="freetown.pdf">this PDF</a> on one sheet of paper, double-sided, to get a reproduction of the set of double-sided pentominoes
+needed for this puzzle.<p>
+
+<a href="solution.html">Solution</a>
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/freetown.pdf b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/freetown.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..a234581b422756402e51fe97ff4f5a8578bc61ed
Binary files /dev/null and b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/freetown.pdf differ
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..ddf7c27affde193b6d1ca24087b1d72e2071add9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Freetown_freetown.html/solution.html
@@ -0,0 +1,19 @@
+<HTML>
+	<HEAD>
+		<TITLE>Freetown: Solution</TITLE>
+	</HEAD>
+<BODY>
+	<H1>Freetown: Solution</H1>
+<P>In the original configuration, some of the pentominoes can be flipped over to form the following two grids:</P>
+
+<IMG src="solution.png">
+
+<p>In the first grid, there are words hidden in the grid Boggle-style, such as "CELTICS", "RED SOX", "POPS" (and perhaps others) all of which clue <strong>BOSTON</strong>.
+
+<p>The other side, if read in a spiral, says: "COMMON NAME FOR INSTITUTE OF HIGHER LEARNING
+THAT INCLUDES GRAD SCHOOL". That clues <strong>UNIVERSITY</strong>
+
+<p>The answer is, therefore, <strong>BOSTON UNIVERSITY</strong>.
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/puzzle b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/puzzle
new file mode 100644
index 0000000000000000000000000000000000000000..5c597fd14b4c8b9d4e799227fe03ce675c2059d1
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/puzzle
@@ -0,0 +1,2804 @@
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+with Text_IO;
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 65 25 2 33 2 1 4 57 5
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+procedure Puzzle is
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+end Puzzle;
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
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+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
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+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
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+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 25 90 1 4 5 2 23 23 96 45 23 21 46 78 93 4 45 56 5 6 23 5 6 56 78 89 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 9 5 26 58 74 42 5 56 78 89 5 26 58 74 42 58 
+-- 64 13 65 6 6 9 7 5 25 42 36 23 12 12 4 45 78 56 28 1 1045 78 56 28 1 10 14 45 65 36 89 78 52 63 56 98 5 25 63 78 74 8 7 4 1 25 89 34 12 52 89 34 12 25 89 3
+-- 4 12 52 89 34 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 
+-- 65 23 12 10 1 4 7 8 9 6 5 2 36 56 25 2 52 5 56 9 98 82 54 75 15 65 98 2 5 6 3 70 70 40 21 25 54 45 7 4 45 58 52 52 56 3 2 5 4 1 2 54 52 56 58  52 56 58 54 
+-- 52 13 20 6 58 54 52 13 20 47 48 59 56 8 59 56 86 52 15 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 52 89 34 12 25 89 34 12 52 89 34
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 87 5 6 9 87 56 22 2 2
+-- 12 54 4 5 9 85 65 36 89 78 52 63 56 6 89 78 52 63 56 98 5 25 63 2 63 56 98 5 25 63 78 74 8 7 4 1 3 78 74 8 7 4 1 25 89 34 12 54 4 5 9 8 5 58 65 23 12 5 56 
+-- 78 89 5 26 58 74 42 58 64 13 65 6 6 9 7 5 25 42 36 23 12 12 5 45 5 7 8 58 52 12 23 2 2 2 5 45 58 62 4 45 58 52 52 56 3 2 89 34 12 45 5 6 5 8 7 1 5 2 3 66 5
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/reusefind b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/reusefind
new file mode 100644
index 0000000000000000000000000000000000000000..949eba2dcb101718f1c8711d93a82bdb51dab816
Binary files /dev/null and b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/reusefind differ
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..65749669d3554ad86b825a5996b14e21cdba2982
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Prague_prague.html/solution.html
@@ -0,0 +1,43 @@
+<html><head>
+<title>Prague: Solution</title>
+</head><body>
+<h1>Prague: Solution</h1>
+
+The <a href="reusefind">executable</a> contained on the first floppy that the solving team receives is an Irix (Silicon Graphics) executable, compiled from an Ada source using the GCC compiler in Ada mode on an Athena SGI (a now extinct type of workstation). Running this file on an SGI workstation output the text:
+<pre>
+	Run to the top of the stairs at the southeast end of Building 24 for
+	another great reuse find!
+</pre>
+
+<p>The string could also be retrieved by reading the file in a low level text editor (it's clearly visible even in Windows Notepad) -- doing so would also clue the
+solver to the fact that it's an Irix executable, since the file contains multiple references to MIPS, the type of CPU used by the SGI workstations.</p>
+
+<p>At the indicated location, the solving teams would find floppies imore and a sign posted above them that read: "<em><strong>Without</strong> a programmer to write the software and a platform to run it on, you're left with a pretty stupid system.</em>" This floppy contained a gzipped <a href="puzzle">plain text file named puzzle</a>, which is a piece of Ada code. The code included many commented lines (double-dashes), ignored by the compiler, and interspersed among them, a short program:</p>
+
+<PRE>
+with Text_IO;
+procedure Puzzle is
+begin
+ Text_IO.Put_Line("2 39 27 30 25 29 4 10 5 13 21 29 42 10 24 13 12 12 14 32 12 29");
+end Puzzle;
+</PRE>
+
+<p>Even without running the program, it's evident that all it does is print the following string of numbers:</p>
+
+<pre>2 39 27 30 25 29 4 10 5 13 21 29 42 10 24 13 12 12 14 32 12 29</pre>
+
+<p>Notice that the sign posted above the floppies had the word "without" in bold. That was a clue for solvers to "subtract" the "programmer" and the "platform" from the numbers output by the program. Since the programming language is Ada, the programmer is Augusta Ada Lovelace, and the platform is Irix. Thus, if we convert "Augusta Ada Lovelace Irix" to numbers, and subtract it from the string output by the program, we get:</p>
+
+<pre>
+   2  39  27  30  25  29  4  10  5  13  21  29  42  10  24  13  12  12  14  32  12  29
+-  a  u   g   u   s   t   a  a   d  a   l   o   v   e   l   a   c   e   i   r   i   x
+   1  21  7   21  19  20  1  1   4  1   12  15  22  5   12  1   3   5   9   18  9   24
+--------------------------------------------------------------------------------------
+   1  18  20  9   6   9   3  9   1  12  9   14  20  5   12  12  9   7   5   14  3   5
+   a  r   t   i   f   i   c  i   a  l   i   n   t   e   l   l   i   g   e   n   c   e
+</pre>
+
+<p>The answer is, therefore, <strong>ARTIFICIAL INTELLIGENCE</strong>.</p>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..33744225e1d2c2b18c6fcc548988a95dc4cb079e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/solution.html
@@ -0,0 +1,30 @@
+<html>
+<head>
+<title>Tbilisi: Solution</title>
+</head>
+<body>
+
+<h1>Tbilisi: Solution</h1>
+<p>
+The call letters correspond to real stations in various cities:
+</p>
+<p><ul>
+<li>WRGB Albany</li>
+<li>WLTZ Columbus</li>
+<li>KOCO Oklahoma City</li>
+<li>KARE Minneapolis</li>
+<li>KARD Monroe, LA</li>
+<li>KOSA Odessa</li>
+<li>WCBS New York City</li>
+<li>WHYY Wilmington</li>
+<li>WESH Orlando</li>
+<li>WREX Rockford, IL</li>
+<li>WHO Des Moines</li>
+</ul></p>
+
+<p>The cities form an acrostic spelling A COMMON WORD. Each TV show or movie 
+in the listing contains the word THE.  The answer to the puzzle is <strong>THE</strong>.</p>
+
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/tbilisi.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/tbilisi.html
new file mode 100644
index 0000000000000000000000000000000000000000..8f44a5447965038cbd8d56131de893abf48b35a0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Tbilisi_tbilisi.html/tbilisi.html
@@ -0,0 +1,310 @@
+<html>
+<head>
+<title>Tbilisi</title>
+</head>
+<body>
+
+<h1>Tbilisi</h1>
+
+
+<div align="left">
+
+  <table border="1" width="100%" cellspacing="0" cellpadding="0" bordercolordark="#000000" bordercolorlight="#000000" bordercolor="#000000">
+
+    <tr>
+
+      <td width="11%" bgcolor="#000000">&nbsp;</td>
+
+      <td width="11%" align="center"><font face="Arial Black">8 PM</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">8:30</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">9 PM</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">9:30</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">10 PM</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">10:30</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">11 PM</font></td>
+
+      <td width="12%" align="center"><font face="Arial Black">11:30</font></td>
+
+    </tr>
+
+    <tr>
+
+      <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">6</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WRGB</font></td></tr></table></td>
+
+      <td width="44%" valign="top" colspan="4"><font size="2">The Wonderful World of Disney:
+
+        Honey, I Shrunk the Kids, Rick Moranis ***</font></td>
+
+      <td width="22%" valign="top" colspan="2"><font size="2">The 10 O'clock News
+
+      Hour</font></td>
+
+      <td width="11%" valign="top"><font size="2">Siskel &amp; Ebert at the
+
+        Movies</font></td>
+
+      <td width="12%" valign="top"><font size="2">In the Heat of the Night
+
+        &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+      <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">8</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WLTZ</font></td></tr></table></td>
+
+      <td width="44%" valign="top" colspan="4"><font size="2">Wag the Dog, 1998,
+
+        Dustin Hoffman, Robert De Niro ***</font></td>
+
+      <td width="22%" valign="top" colspan="2"><font size="2">Homicide: Life on
+
+        the Street</font></td>
+
+      <td width="23%" valign="top" colspan="2"><font size="2">It's Showtime at
+
+        the Apollo</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">20</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KOCO</font></td></tr></table></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Sonny and Cher
+
+      Show</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Gary Shandling
+
+      Show</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Larry Sanders
+
+      Show</font></td>
+
+    <td width="12%" valign="top"><font size="2">The 11 O'clock News</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Tonight Show</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">23</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KARE</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Simpsons</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Simpsons</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Simpsons</font></td>
+
+    <td width="11%" valign="top"><font size="2">King of the Hill</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The X-Files</font></td>
+
+    <td width="23%" valign="top" colspan="2"><font size="2">Star Trek: The Next
+
+      Generation</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">26</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KARD</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Waltons</font></td>
+
+    <td width="44%" valign="top" colspan="4"><font size="2">Star Trek: The Wrath
+
+      of Khan, William Shatner, Leonard Nimoy, Ricardo Montalban&nbsp; ****</font></td>
+
+    <td width="34%" valign="top" colspan="3"><font size="2">Conan the Barbarian, Arnold Schwarzanegger, James Earl Jones,
+
+      1982 *** &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">28</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KOSA</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Price is Right</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Dating Game</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Oprah Winfrey
+
+      Show</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2"> Making of the
+
+      X-Files Movie</font></td>
+
+    <td width="23%" valign="top" colspan="2"><font size="2">Little House on the
+
+      Prairie<br>
+
+      </font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">30</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WCBS</font></td></tr></table></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">Star Trek: The Next
+
+      Generation</font></td>
+
+    <td width="45%" valign="top" colspan="4"><font size="2">The Falcon and the
+
+      Snowman, Timothy Hutton, Sean Penn, 1985 ****</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">Father of the Bride, Steve Martin,
+
+      1991 *** &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">32</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WHYY</font></td></tr></table></td>
+
+      <td width="11%" valign="top"><font size="2">The Beverly Hillbillies</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Brady Bunch</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Wonder Years</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Love Boat</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Dick Van Dyke Show</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Mary Tyler Moore Show</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Mod Squad</font></td>
+
+      <td width="12%" valign="top"><font size="2">The Wild, Wild West</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">34</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WESH</font></td></tr></table></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">&lt;&lt; Cry, The
+
+      Beloved Country, James Earl Jones, ****</font></td>
+
+    <td width="44%" valign="top" colspan="4"><font size="2"> Close Encounters of
+
+      the Third Kind, Richard Dreyfus ***</font><font size="1">1/2</font></td>
+
+    <td width="23%" valign="top" colspan="2"><font size="2">Voyage to the Bottom
+
+      of the Sea, Peter Lorre, 1961 *** &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">49</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WREX</font></td></tr></table></td>
+
+    <td width="33%" valign="top" colspan="3"><font size="2">Butch Cassidy and
+
+      the Sundance Kid, Robert Redford, Paul Newman, 1969 ****</font><font size="1">1/2</font></td>
+
+    <td width="56%" valign="top" colspan="5"><font size="2">Return of the Jedi, Mark Hammill, Carrie Fisher,
+
+      Harrison Ford, James Earl Jones ****</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">53</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WHO</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Addams Family</font></td>
+
+    <td width="33%" valign="top" colspan="3"><font size="2">When
+
+      Dinosaurs Ruled the Earth, Victoria Vetri, Robin Hawdon, 1970 *</font><font size="1">1/2</font></td>
+
+    <td width="11%" valign="top"><font size="2">Dennis the Menace</font></td>
+
+    <td width="34%" valign="top" colspan="3"><font size="2">The Day the Earth
+
+      Stood Still, 1951, Michael Rennie **</font><font size="1">1/2</font></td>
+
+    </tr>
+
+</table>
+
+</div>
+
+<p><em>Archivist's Note:</em> A hint provided to the teams at hunt time indicated that any typos in the grid above are not part of the puzzle.</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
+
+
+
+
+
+
+
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diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/checkanswer.js
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index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
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+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..bff01306b206de8636ea9afcfae0b4217c80d0ab
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/solution.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+  <title>Toronto: Solution</title>
+</head>
+<body>
+<h1><b>Toronto: Solution</b></h1>
+<p>For the first part of the puzzle, the music is all by Johann Sebastian Bach. Bach's compositions can be identified by their <a href="http://en.wikipedia.org/wiki/Bach-Werke-Verzeichnis">BWV number</a>. Identifying the pieces and doing the arithmetic indicated will produce an IP address:</p>
+<p><b>First group of numbers:</b></p>
+<p>[({Concerto for Two Violins in D Minor, BWV 1043} - {Fugue in C minor, WTC I, BWV 847}) + ({Concerto in F Minor, BWV 1056} - {Brandenburg Concerto No. 5, BWV 1050}) + 7]</p>
+<p><b>Second group of numbers:</b></p>
+<p>[({Concerto for Three Harpsichords in D Minor, BWV 1063} - {Brandenburg Concerto No. 4 in G Major, BWV 1049}) - 7]</p>
+<p><b>Third group of numbers:</b></p>
+<p>[({The Christmas Oratorio, BWV 248} - {St. Matthew's Passion, Pt. 1: No. 8, Aria "Blute nur, du liebes Herz!", BWV 244}) * ({Bach - Invention No. 13 in A Minor, BWV 784} - {Invention in F Major, BWV 779}) * 7]</p>
+<p><b>Fourth group of numbers:</b></p>
+<p>[(French Suite No.6 in E Major, BWV 817 + The Goldberg Variations, BWV 988 - Prelude and Fugue in A major, BWV 888) / 7]</p>
+<p>1043-847+1056-1050+7 = 209</p>
+<p>1063-1049+7 = 21</p>
+<p>(248-246)(784-779)7 = 70</p>
+<p>(817+988-888)/7 = 131</p>
+<p>The required IP address is, therefore, <b>209.21.70.131</b>.
+<p>It is presumed that the Toronto news article shown at the bottom of the puzzle was at that IP address. The vices in the article had certain letters capitalized. Anagramming them produced <b>INDEPENDENT LIVING GROUP</b>, which was the answer.
+</body>
+</html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/toronto.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/toronto.html
new file mode 100644
index 0000000000000000000000000000000000000000..9299ab6d3001648e95e950c9bfac344dde587727
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Toronto_toronto.html/toronto.html
@@ -0,0 +1,64 @@
+<html>
+<head>
+<title>Toronto</title>
+</head>
+<body>
+
+<h1>Toronto</h1>
+
+<p>Solve each of the bracketed equations. Some of
+the files provided are very long; if you can recognise the song from
+the introduction, you don't have to listen to the entire file (that
+is, the files only contain music; there are no "hidden messages" or
+anything).</p>
+
+<p>You can listen to MIDIs on athena% by using "soundplayer" on the
+SGI (the headphone jack on the Indies is somewhere on the lower side
+of the back right corner).</p>
+
+<P>&nbsp;
+<P>
+
+<TABLE ALIGN="CENTER">
+<TR>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="1a.mid">?</A> - <A HREF="1b.mid">?</A>) +
+      (<A HREF="1c.mid">?</A> - <A HREF="1d.mid">?</A>) + 7]</FONT></TD>
+  <TD><FONT SIZE="5"><B><CENTER>.</CENTER></B></FONT></TD>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="2a.mid">?</A> - <A HREF="2b.mid">?</A>) - 7]</FONT></TD>
+  <TD><FONT SIZE="5"><B><CENTER>.</CENTER></B></FONT></TD>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="3a.mid">?</A> - <A HREF="3b.mid">?</A>) *
+      (<A HREF="3c.mid">?</A> - <A HREF="3d.mid">?</A>) * 7]</FONT></TD>
+  <TD><FONT SIZE="5"><B><CENTER>.</CENTER></B></FONT></TD>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="4a.mid">?</A> + <A HREF="4b.mid">?</A> -
+      <A HREF="4c.mid">?</A>) / 7]</FONT></TD>
+</TR>
+</TABLE>
+
+<P>&nbsp;</P>
+
+
+<p><i>Archivist's Note</i>: Solving the above would lead solvers to the following press release:</p>
+
+<pre>
+For immediate release - January 12, 1999
+=============================================================
+Toronto Researcher Indulges in MIT Vices!
+=============================================================
+Toronto, Ont., January 12, 1999-- Neal H. Dorow, senior researcher in
+the Ontario National Ministry of StickY ShiFT-kEys, has just completed
+his sabbatical at the Massachusetts Institute of Technology in
+Cambridge, Massachusetts, USA. While there, he conducted an extensive
+double-blind study of off-campus social life. These are the shocking
+results of his study. Naturally, we are appalled.
+
+wilg - bROthEl
+no. 6 - ENNUI
+epsilon theta - PoLyGamy
+pika - DruGs
+student house - klEPTomaNia
+fenway house - VINDictiveness
+</pre>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..ea2eaa206e86aecc4018c1818fcc003bff3b98cc
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/solution.html
@@ -0,0 +1,13 @@
+<html>
+<head>
+<title>Warrant 1.1: Solution</title>
+</head>
+<body>
+
+<h1>Warrant 1.1: Solution</h1>
+<p>
+The answer is <strong>MUSE</strong>.
+</p>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/w1.1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/w1.1.html
new file mode 100644
index 0000000000000000000000000000000000000000..60309dfb79b78016e9913b0c324f3487d68e9a9d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.1_w1.1.html/w1.1.html
@@ -0,0 +1,33 @@
+<html>
+<head>
+<title>Warrant 1.1</title>
+</head>
+<body>
+
+<h1>Warrant 1.1</h1>
+<p>
+Sometimes brute force is not the way to catch a crook. Sometimes it takes...
+music. Your mission, should you choose to accept it, is to write and perform
+a heroic ballad for us.
+</p>
+
+<p>Your ballad must:</p>
+<p>
+<ul>
+<li>have words
+<li>be sung in our offices by at least two people together
+<li>run at least two minutes long
+<li>talk about the final struggle with the crook
+<li>make some mention of the ultimate struggle with Carmen
+<li>have an original melody
+<li>have a pun in it
+<li>contain the word "quintessential"
+<li>rhyme (more often than not)
+<li>mention the name of your team
+<li>use at least one adjective from the New York City puzzle
+</ul>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..e7c148f6388448e316ac63f2186cefba0dc54933
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/solution.html
@@ -0,0 +1,20 @@
+<html>
+<head>
+<title>Warrant 1.2: Solution</title>
+</head>
+<body>
+
+<h1>Warrant 1.2: Solution</h1>
+<p>The characters are:</p>
+<p>
+<a href="solution/11ans.jpg">Racer X (Speed Racer)</a>, <a href="solution/12ans.jpg">American Maid (The Tick)</a>, <a href="solution/13ans.jpg">Kodachi (Ranma 1/2)</a>, Lady Jane (G.I. Joe)<br>
+The Brain (Animaniacs), Judy Jetson (The Jetsons), <a href="solution/23ans.jpg">Jonny Quest</a>, Jeannette (Alvin and the Chipmunks)<br>
+<a href="solution/31ans.jpg">Kenshin (Rouroni Kenshin)</a>, Lisa Simpson (The Simpsons), Michigan J. Frog (Warner Brothers), Sheila (Dungeons & Dragons)<br>
+Bedtime Bear (The Care Bears), <a href="solution/42ans.jpg">Sherman (Rocky & Bullwinkle)</a>, Stimpy (Ren and Stimpy), Mr. Magoo<br>
+Betty Boop, <a href="solution/52ans.jpg">Sweet Polly Purebred (Underdog)</a>, Skeletor (He-man), Firefly (My Little Pony)
+</p>
+
+<p>Each group of characters had a common letter. In order, the letters spell out: <strong>ANIME</strong>.
+
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/w1.2.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/w1.2.html
new file mode 100644
index 0000000000000000000000000000000000000000..26734f50230bafafc44cf4c07d0128ba7011e80d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.2_w1.2.html/w1.2.html
@@ -0,0 +1,41 @@
+<html>
+<head>
+<title>Warrant 1.2</title>
+</head>
+<body>
+
+<h1>Warrant 1.2</h1>
+<p>
+Identify these alarming characters, and figure out what each group has in 
+common.</p>
+
+<p>
+<a href="11.jpg">(5, 1)</a>
+<a href="12.jpg">(8, 4)</a>
+<a href="13.jpg">(7)</a>
+<a href="14.jpg">(4, 4)</a></p>
+<p>
+<a href="21.jpg">(3, 5)</a>
+<a href="22.jpg">(4, 6)</a>
+<a href="23.jpg">(5, 5)</a>
+<a href="24.jpg">(9)</a></p>
+<p>
+<a href="31.jpg">(7)</a>
+<a href="32.jpg">(4)</a>
+<a href="33.jpg">(8, 1, 4)</a>
+<a href="34.jpg">(6)</a></p>
+<p>
+<a href="41.jpg">(7, 4)</a>
+<a href="42.jpg">(7)</a>
+<a href="43.jpg">(6)</a>
+<a href="44.jpg">(2, 5)</a></p>
+<p>
+<a href="51.jpg">(5, 4)</a>
+<a href="52.jpg">(5, 5, 8)</a>
+<a href="53.jpg">(8)</a>
+<a href="54.jpg">(7)</a></p>
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..ce03714db515ca6ea6cb9adfdd751357505d94b5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/solution.html
@@ -0,0 +1,20 @@
+<html>
+<head>
+<title>Warrant 1.3: Solution</title>
+</head>
+<body>
+
+<h1>Warrant 1.3: Solution</h1>
+<p>
+This is a stereogram. View it in the usual way and you will see six letters:</p>
+<p>
+<pre>
+ST
+ER
+EO
+</pre></p>
+<p>So the answer is <strong>STEREO</strong>.</p>
+
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/w1.3.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/w1.3.html
new file mode 100644
index 0000000000000000000000000000000000000000..7a4b4b3c407a05e17df865c22ef492d01078d166
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_1Gumshoe_Warrants1_w1.3_w1.3.html/w1.3.html
@@ -0,0 +1,83 @@
+<html>
+<head>
+<title>Warrant 1.3</title>
+</head>
+<body>
+
+<h1>Warrant 1.3</h1>
+<p>
+Print this puzzle out on a single sheet of paper, and don't forget to have fun!
+</p>
+<p>
+<pre>
+O]AGLX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTP
+1AICUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh
+Ff4!|Cb[RSk89DFf4|Cb[RSk89D4|Cb[RSk89D4HO|Cb[RSk89D4HOb[RSk89D4HOb[RSk89D4BYHOb
+dW73URXt12SkNbdW7URXt12SkNW7URXt12SkNW7U{6RXt12SkNW7U{Xt12SkNW7U{Xt12SkNW7]BU{X
+%OBUAthS6lJfG0%OBAthS6lJfGOBA7CthS6lJOBA5E7CthS6lJOBA5E7CthS6lBA5E[&7CthS6lBA5E
+OUK9]NFt5JPQ8YOUK]NFt5JPQ8UK]RHNFt5JPQ8UK]RHNFt5JPQ8UK]RHNFt5J8UK]ZORHNFt5J8UK]
+Vb{B82W4QfFMTdVb{82W4QfFMTd{825ZW4QfFMTd{825ZW4QfFMTd{825ZW4QfTd{8J025ZW4QfTd{8
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+LNd8#&P9fG0A[bLNd#&P90A[bLNd#&P90A[bLNdMQ#&P90A[bLNdMQP90A[bLNdMQP90A23[bLNdMQP
+Pd4}0%YT?fNtKBPd40%YTNtKBPd40%YTNtKBPd4Sl0%YTNtKBPd4Sl0TNtKBPd4Sl0TNb2tKBPd4Sl0
+2@#48O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX9
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+</pre>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/blue.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/blue.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d7a73f9e8f26dd206bc085454077e7fc25286bd9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/blue.txt
@@ -0,0 +1,107 @@
+***********Blue*********************
+
+
+(start) B: Are you ready to play the questions game?
+
+<...dialog puzzle?>
+B: Are you all set to go?]
+
+<...late?| ...for nothing?>
+B: Are you confused yet? 
+
+<.. soup yet?>
+B:Do you know how to make spicy chicken soup?
+
+<...cross the road?>
+B: You can talk the talk, but can you walk the walk?
+
+<... sniggering..>
+B: You okay?
+
+<...driveway...parkway..>
+B: Why all these questions?
+
+<.. better than me?>
+B: Why are you asking me this?
+
+<...game end?>
+B: Was there something you wanted to tell me?
+
+<...time is..>
+B: Why don't you hit the road?
+
+<...I'm solving..>
+B: Can you give me a specific example?
+
+<...gone far...>
+B: Do you think I have gone far enough to be on sprokets?
+
+<... but what if the [animal]....>
+B: What is your obsession with [animal]s?
+
+<... darkest fear?>
+B: Can you imagine your mother bringing a clean pair of underwear to you in the middle of 7ths grade?
+
+<... real life mother?>
+B: Would your mother have allowed that?
+
+<...childhood...>
+B: What were you raised in a barn?
+
+<Are you done...>
+B: Shall we change the topic of discussion?
+
+<what's the ... word? | ...solve this hunt?>
+B: And how do you want to pay for that sensitive information?
+
+<...corner of Vassar and Mass ave?>
+B: Do you really want sludge through drifts of sleet and snow?
+
+<...had your pockets...|...in my pockets?| ...in your pocket...>
+B: What is like pool without pockets?
+
+<knock, knock...|Anybody there?>
+B: Can we help you?
+
+
+
+<... ducking...>
+B: Whats the difference between a duck?
+
+<What is the difference between...?>
+B: Don't you get it?
+
+<Get what?>
+B: Could you get the door please?
+
+<What does... look like?>
+B: Doesn't she look just like her mother?
+
+<..naked..>
+B: Have you ever been to a nude beach?
+
+
+
+
+
+< .. I think so , Brain...>
+B: Can't you ask something not from a tv show?
+
+<...maiden name?>
+B: What is the maiden name of Richie, Dolores, and June's mother?
+
+<...family tree..>
+B: Do you friends usually answer your questions?
+
+<... jump off a bridge..>
+B: Do I get a bungy cord?
+
+<...bounce...>
+B: What is the name of Kim's pet dingo?
+
+<...cester?>
+B: What breakfast item does Steve always put Worcestershire sauce on?
+
+<What item?>
+B: Orange you glad I didn't say banana?
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/charlotteamalie.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/charlotteamalie.html
new file mode 100644
index 0000000000000000000000000000000000000000..a9b264fc24898c525dec02fb83c09e6598421738
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/charlotteamalie.html
@@ -0,0 +1,36 @@
+<html>
+<head>
+	<title>Charlotte Amalie</title>
+</head>
+<body>
+<h1>Charlotte Amalie</h1>
+
+
+<p>This is a performing arts puzzle. It will go about five billion times
+smoother and faster if you look over your lines before your rehersals
+begin. There are five "actors": red, yellow, green, blue and purple.
+They meet in 10 scenes. As one of the actors (see below) you will be
+performing in only 4 of the scenes. It's a play about questions, and
+you've many. But unfortunately, you don't have the whole script, just
+cues (in brackets) before your lines and your lines are all out
+of order so you don't know the ultimate question. The ultimate question
+might be one not in this email, i.e., one another team asks you.</p>
+
+<p>You must try and schedule your own meeting times with teams of other
+colors (perhaps the zephyr instance would be useful). | indicates "or".
+This puzzle would work best by distibuting an "actor's" lines out to various
+team members who memorize their cues and lines. Things in parentheses are
+actions and you must do them. Typos are irrevelant.</p>
+
+<p><em>Archivist's Note:</em> The teams were each assigned a color and emailed one
+of the following five scripts (with the introduction quoted above):</p>
+
+<a href="blue.txt">Blue</a><br>
+<a href="green.txt">Green</a><br>
+<a href="purple.txt">Purple</a><br>
+<a href="red.txt">Red</a><br>
+<a href="yellow.txt">Yellow</a><br>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/green.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/green.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8d01ef63da2ccca3bdfa6e81d683d890f0dc7e9e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/green.txt
@@ -0,0 +1,123 @@
+***********Green*********************
+
+(start) G: Anybody want to do the dialog puzzle?
+
+<set to go? | dialog puzzle? >
+G:  Umm, I think so, Brain, but what if the chicken won't wear the nylons?
+
+<...obsession....>
+G: What are your obsessions and darkest fears?
+
+<....imagine your mother....>
+G: Whats that movie called that stars Emma Thompson and her real life mother?
+
+<Would your mother have ...?>
+G: What was your childhood like?
+
+<...in a barn?>
+G: Are you done insulting me yet? 
+
+<....topic of discussion?>
+G: What's the magic word?
+
+<...pay for that...| ... withdraw some...>
+G: What bank has an ATM on the corner of Vassar and mass ave?
+
+<....sludge through drifts...|...bite to eat...>
+G: How much money do you think I have in my pockets?
+
+<knock knock...>
+G: Who's asking?
+
+< ... mean?>
+G: Isn't there a puzzle that uses questions?
+
+< .... solved?>
+G: What was your cue on that last question?
+
+< ... answers...>
+G: Where are all of your hard won answers hidden?
+
+<... where you are?>
+G: Where in Hell are we?
+
+<... geography...>
+G: What is the capitol of spain?
+
+<... Carmen Sandiago....>
+G: Where in hell is Carmen Sandiago?
+
+<... attractive....>
+G: Who is taller, Emma Thompson or Carmen Sandiago?
+
+
+<...late...| waiting around >
+G: Did someone say a round latte? 
+
+<...McDonalds?>
+G: Is that not the poison of true love?
+
+<...water-babies..>
+G: What is like pool without pockets?
+
+
+<... on his lips?>
+G: Wasn't it Romeo that took his last sip of bitterness and cold?
+
+<Did you see...> 
+G: How did they get all those vibrent colors into it?
+
+<...Leonardo DiCaprio?>
+G: How did they get the blue in his eyes and shirts match so well?
+
+<... laundry?>
+G:What are the two things that Mary uses in her laundry?
+
+<...underwear..>
+G: Can't you afford a maid?
+
+<...little maid's outfit?>
+G: What kind of girl do you think I am?
+
+<What was I thinking?>
+G: Are you thinking what I'm thinking?
+
+<... Pete Rose...>
+G: Was baseball an Olympic sport in Barcelona?
+
+<Anybody there?>
+G: Are you here for the dialog game?
+
+<...real question?>
+G: Don't other questions come to mind?
+
+<...pig's..>
+G: How much wood would a wood chuck chuck if a woodchuck could chuck wood?
+
+<..fools fall..>
+G: Are you a fool? 
+
+<RU?>
+G: Do you think this is getting a little patronizing?
+ 
+<..dog?>
+G: Are you done insulting me yet?
+
+<..talking about?>
+G: What's the answer to life?
+
+<the universe?>
+G: and everything?
+
+<...6x9...>
+G: Are number questions out of bounds?
+
+<... factual...>
+G: Do you mean like in Rosencranz and Guildenstern are dead? 
+
+<...relief?>
+G: Have you ever heard the phrase 'bituminous coal'?
+
+<..grab a bite...>
+G: How much money do you think I have in my pockets?
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/purple.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/purple.txt
new file mode 100644
index 0000000000000000000000000000000000000000..885f233124150538b98f8142f6fa2a7030a2ad27
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/purple.txt
@@ -0,0 +1,124 @@
+***********Purple*********************
+
+(start) P: Anyone up this late?
+
+<Knock knock, anybody home?|anybody there?>
+ P: Do you think we would leave our headquarters ungaurded?]
+
+<...dialog puzzle?|questions game?>
+P: Do you think we are waiting around here for nothing?
+
+<...confused yet?>
+P: Is it soup yet?
+
+<...spicy chicken soup?>
+P: Why did the chicken cross the road?
+
+<...walk the walk...>
+P: (walk the walk) What are you sniggering at?
+
+<You okay?>
+P: How come in english you park on a driveway and drive on a parkway?
+
+<... all these characters?>
+P: What do you think you are better than me?
+
+<...asking me this?>
+P: When does this game end?
+
+<...tell me?>
+P: What time is it?
+
+<..hit the road?>
+P: Can't you tell I'm solving here?
+
+<... far enough?> 
+P: Don't you think you've gone far enough?
+
+<...sprockets>
+P: What's a spool with sprockets?
+
+<What do you think?>
+P: Are you thinking what I'm thinking?
+
+<...Marco Polo?|...Barcelona?>
+P: What is the capitol of spain?
+
+<...Carmen Sandiago..>
+P: Do you think Carmen Sandiago is attractive? 
+
+<Do you know who I....>
+P: Why are you staring at me?
+
+<...sign?>
+P: Can you name all 12 zodiac signs?
+
+< Have you ever...?>
+P: Have you ever held hands on a date?
+
+<...go out...>
+P: What exactly does "go out" mean?
+
+<...ice cream...>
+P: Don't you think it is a little cold out for that?
+
+<..we can't be friends?>
+P: What does frostbite have to do with friendship?
+
+<...marry me?>
+P: Why would I marry someone I only just met?
+
+<When shall.?>
+P: When is Easter this year?
+
+<Did  someone say...?>
+P: Did someone say McDonalds?
+
+<...poison...>
+P: Who died with that on his lips?
+
+<...Romeo...> 
+P: Did you see the movie or the play?
+
+<...vibrant colors..>
+P: So am I to assume you had a crush on Leonardo DiCaprio? 
+
+<...[color] in his eyes...>
+P: Isn't [color] a really bad color to put in the laundry?
+
+<...Mary...>
+P: Can you imagine Mary bringing a clean pair of underwear to you in the middle 
+of 7ths grade?
+
+<... a maid?>
+P: What do you think of those short little maid's outfits?
+
+<What kind of .... do you think I am?>
+P: What was I thinking?
+
+<Are you thinking what I'm thinking?>
+P: I think so, Brain, but Pete Rose? I mean, can we trust him?
+
+<...why does he keep doing it?>
+P: Why does anyone keep doing anything?
+
+<...which president did he...>
+P: Who is the current president of the United States?
+
+< You are not going to ... are you?>
+P: I think so, Brain, but me and Pippi Longstocking -- I mean, what would the
+children look like?
+
+<...monkey's [relative]...>
+P: Does it look anything like a mule's [relative]?
+
+
+<.....wouldn't you?>
+P: Are you speaking english?
+
+<... the language of love?>
+P: Does love taste more like honey or bittersweet chocholate?
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/red.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/red.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5a7e55ec97e94a5d2bd968d2b75c81958a0c2f25
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/red.txt
@@ -0,0 +1,101 @@
+***********Red*********************
+
+(Start) R: Knock knock anybody home?
+
+<yes|anybody there>
+R: How is your hunt going?
+
+<...tell you that? | Isn't there a puzzle...?>
+R: How many puzzles have you solved?
+
+<.... this one?>
+R: Have you solved Charlotte Amalie yet?
+
+<... name....>
+R: What is your name?
+
+<...matter...|...staring...>
+R: What's your sign?
+
+<...rude? | answers hidden>
+R: Do you know where you are?
+
+<Where in Hell are we?>
+R: Did you have geography when you were in elementary school?
+
+<... taking me somewhere?>
+R: Do you know what year it is?
+
+<... are you running for .... | this year>
+R: Who is the current president of the United States?
+
+< .... president....>
+R: Whose talking about presidents?
+
+<.... wives....| who's asking? | dialog puzzle?>
+R: How do you mean?
+
+<...unguarded? | ....up this late?>
+R: Do you think?
+
+<...what I'm thinking?>
+R: I think so, Brain, but don't you need a swimming pool to play Marco Polo?
+
+<...capitol of [country]?>
+R: Is [country] where Carmen Sandiego is?
+
+< Do you think....attractive?|Where in hell is Carmen ...>
+R: Do you know who I think is attractive?
+
+<Can you name all 12..?>
+R: Have you ever taken a purity test?
+
+<... a date?>
+R: Will you go out with me?
+
+<What exactly does "[x]" mean?>
+R: Don't you think it is romantic when two people share an ice cream soda?
+
+<..little cold..>
+R How can we be lovers if we can't be friends?
+
+<... frost bite...>
+R: Will you marry me?
+
+<... only just met?>
+R: When shall I meet thee again?
+
+<ready to play the question game?|Can we help you?>
+R: What was Jackie Kennedy's maiden name?
+
+<... Richie, Dolores, and June's....>
+R: Why are you ducking my questions?
+
+<...difference between a duck?>
+R: Whats the difference between a duck and a what?
+
+<... get it?>
+R: Get what?
+
+<...get the door...>
+R: (look out of door) What does Emma Thompson look like?
+
+<...look just like her mother?|.. taller, Emma Thompson..>
+R: Whats that movie called that stars Emma Thompson and her real life mother?
+
+<Would your [relative] have allowed that?>
+R: Would your [relative] have allowed you to appear naked at a public function?
+
+<....beach?>
+R: Have you ever dived in the water at a swimming meet and had your pockets 
+fill up with water and drag your shorts down?
+
+<...cue...>
+R: Do you think I am jsut going to show my answerts to you?
+
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..415dcd9b0da2b7b62e685114c0c48e2eb982040f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/solution.html
@@ -0,0 +1,498 @@
+<html>
+<head>
+<title>Charlotte Amalie: Solution</title>
+</head>
+
+<body>
+
+<h1>Charlotte Amalie: Solution</h1>
+
+<p>
+In this puzzle there were five partial scripts, each labeled with a color: <a href="red.txt">Red</a>, <a href="yellow.txt">Yellow</a>, <a href="green.txt">Green</a>, <a href="blue.txt">Blue</a> and <a href="purple.txt">Purple</a>.</p>
+<p>
+Each color had a (possibly overlapping) set of questions and cues which indicated when to say those questions. The goal for the writing team was to
+get teams talking with one another. The goal for a solving team was to figure out which one question (on any color's sheet) was unanswerable in the play. Thus each team had to meet with 4 other teams (each of the other colors) to be able to cross off all of their questions as answerable and determine if there were any unanswerable questions that they had left.</p>
+<p>
+When the 10 possible scenes are reconstructed, each scene ends with an unanswered question. Even though there are 10 scenes, there were only 7 ending questions:</p>
+<p>
+Y: *What was Jackie Kennedy's maiden name? <br>
+R: *Whats that movie called that stars Emma Thompson and her real life mother?<br>
+B: *What is like pool without pockets?<br>
+R: *Who is the current president of the United States?<br>
+G: *What bank has an ATM on the corner of Vassar and mass ave?<br>
+P: *What is the capital of spain?<br>
+Y: *Who died with that on his lips?<br>
+<p>
+Of these questions, six are answered in some other scene (that is, the questions occur before the end of the scene, and thefore technically have a response). The only truly unanswered one was: <strong>What is like pool without pockets?</strong> The answer is, therefore, <strong>BILLIARDS.</strong>
+<p>
+
+<hr>
+
+<h2>Ten Reconstructed Dialog Segments</h2>
+<p>
+-----------------------------
+<p>
+<em> red and yellow </em><br>
+
+[R: Knock knock anybody home?<br>
+Y: Yes?]<br>
+
+[Y: Anybody there?]<br>
+
+R: How is your hunt going?<br>
+
+Y: Do you think I would tell you that?<br>
+
+R: How many puzzles have you solved?<br>
+
+Y: Are you counting this one?<br>
+
+R: Have you solved Charlotte Amalie yet?<br>
+
+Y: What kind of name is Charlotte Amalie?<br>
+
+R: What is your name?<br>
+
+Y: Does that matter?<br>
+
+R: What's your sign?<br>
+
+Y: Don't you think you are being a little rude?<br>
+
+R: Do you know where you are?<br>
+
+Y: Are you taking me somewhere?<br>
+
+R: Do you know what year it is?<br>
+
+Y: What, are you running for the dummy of the year contest?<br>
+
+R: *Who is the current president of the United States?<br>
+
+Y: You're not going to start with the president jokes, are you?<br>
+
+R: Whose talking about presidents?<br>
+
+Y: Don't you think their wives are much more interesting?<br>
+
+R: How do you mean?<br>
+
+Y: *What was Jackie Kennedy's maiden name?<br>
+<p>
+------------------------<p>
+<em> red and green </em><br>
+
+[R: Knock knock anybody home?<br>
+G: Who's asking?]<br>
+[G: Anybody want to do the dialog puzzle?]<br>
+
+R: How do you mean?<br>
+
+G: Isn't there a puzzle that uses questions?<br>
+
+R: How many puzzles have you solved?<br>
+
+G: What was your cue on that last question?<br>
+
+R: Do you think I am going to just show my answers to you?<br>
+
+G: Where are all of your hard won answers hidden?<br>
+ 
+R: Do you know where you are?<br>
+
+G: Where in Hell are we?<br>
+
+R: Did you have geography when you were in elementary school?<br>
+
+G: *What is the capitol of spain?<br>
+
+R: Is that where Carmen Sandiago is?<br>
+
+G: Where in hell is Carmen Sandiago?<br>
+
+R: Do you know who I think is attractive?<br>
+
+G: Who is taller, Emma Thompson or Carmen Sandiago?<br>
+
+R: *Whats that movie called that stars Emma Thompson and her real life mother?<br>
+
+<p>----------------------------<p>
+<em> red and blue </em><br>
+
+[R: Knock knock anybody home?<br>
+B: Can we help you?]<br>
+[B: Are you ready to play the questions game?]<br>
+
+R: *What was Jackie Kennedy's maiden name?<br>
+
+B: What is the maiden name of Richie, Dolores, and June's mother?<br>
+
+R: Why are you ducking my questions?<br>
+
+B: Whats the difference between a duck?<br>
+
+R: Whats the difference between a duck and a what?<br>
+
+B: Don't you get it?<br>
+
+R: Get what?<br>
+
+B: Could you get the door please?<br>
+
+<look out of door>
+R: What does Emma Thompson look like?<br>
+
+B: Doesn't she look just like her mother?<br>
+
+R: *Whats that movie called that stars Emma Thompson and her real life mother?<br>
+
+B: Would your mother have allowed that?<br>
+
+R: Would your <blank> have allowed you to apear naked at a public function?<br>
+
+B: Have you ever been to a nude beach?<br>
+
+R: Have you ever dove in the water at a swimming meet and had your pockets fill up with water and drag your shorts down?<br>
+
+B: *What is like pool without pockets?<br>
+<p>-----------------------------<p>
+
+<em> red and purple </em><br>
+
+[R: Knock knock anybody home?<br>
+ P: Do you think we would leave our headquarters ungaurded?]<br>
+[P: Anyone up this late?]<br>
+
+R: Do you think?<br>
+
+P: Are you thinking what I'm thinking?<br>
+
+R: I think so, Brain, but don't you need a swimming pool to play Marco Polo?<br>
+
+P: *What is the capitol of spain?<br>
+
+R: Is that where Carmen Sandiago is?<br>
+
+P: Do you think Carmen Sandiago is attractive?<br>
+
+R: Do you know who I think is attractive?<br>
+
+P: Why are you staring at me?<br>
+
+R: What is your sign?<br>
+
+P: Can you name all 12 zodiac signs?<br>
+
+R: Have you ever taken a purity test?<br>
+
+P: Have you ever held hands on a date?<br>
+
+R: Will you go out with me?<br>
+
+P: What exactly does "go out" mean?<br>
+
+R: Don't you think it is romantic when two people share a ice cream soda?<br>
+
+P: Don't you think it is a little cold out for that?<br>
+
+R: How can we be lovers if we can't be friends?<br>
+
+P: What does frostbite have to do with friendship?<br>
+
+R: Will you marry me?<br>
+
+P: Why would I marry someone I only just met?<br>
+
+R: When shall I meet thee again?<br>
+
+P: When is Easter this year?<br>
+
+R: * Who is the current president of the United States?<br>
+
+<p>-----------------------------<p>
+<em> yellow and green </em><br>
+
+[Y: Anybody there?<br>
+G: Are you here for the dialog game?]<br>
+[G: Anybody want to do the dialog puzzle?]<br>
+
+Y: Is that the real question?<br>
+
+G: Don't other questions come to mind?<br>
+
+Y: Do pig's fly?<br>
+
+G: How much wood would a wood chuck chuck if a woodchuck could chuck wood?<br>
+
+Y: Why do fools fall in love?<br>
+
+G: Are you a fool?<br> 
+
+Y: Are you?<br> 
+
+G: Do you think this is getting a little patronizing?<br>
+
+Y: (In patronizing tone) Who's a good dog?<br>
+
+G: Are you done insulting me yet?<br> 
+
+Y: What were we talking about?<br>
+
+G: What's the answer to life?<br>
+
+Y: The universe?<br>
+
+G: and everything?<br>
+
+Y: Is that the 6x9 question?<br>
+
+G: Are number questions out of bounds?<br>
+
+Y: Aren't we supposed to stick to facual questions?<br> 
+ 
+G: Do you mean like in Rosencrantz and Guildenstern are dead?<br> 
+
+Y: How do you spell relief?<br>
+
+G: Have you ever heard the phrase 'bituminous coal'?<br>
+
+Y: *Who died with that on his lips?<br>
+
+G: Wasn't it Romeo that took his last sip of bitterness and cold?<br>
+
+Y: Do you want to grab a bite to eat together?<br>
+
+G: How much money do you think I have in my pockets?<br>
+
+Y: Can't you withdraw some?<br>
+
+G: *What bank has an ATM on the corner of Vassar and mass ave?<br>
+
+<p>---------------------------<p>
+
+<em> yellow and blue </em><br>
+
+[Y: Anybody there?<br>
+B: Can we help you?]<br>
+[B: Are you ready to play the questions game?]<br>
+
+Y: Will it help us solve this hunt?<br>
+
+B: And how do you want to pay for that sensitive information?<br>
+
+Y: *What bank has an ATM on the corner of Vassar and mass ave?<br>
+
+B: Do you really want sludge through drifts of sleet and snow?<br>
+
+Y: Well, I think so, Brain, but if Jimmy cracks corn, and no one cares, why does
+he keep doing it?<br>
+ 
+B: Can't you ask something not from a tv show?<br>
+
+Y: *What was Jackie Kennedy's maiden name?<br>
+
+B: What is the maiden name of Richie, Dolores, and June's mother?<br>
+
+Y: So if your sister's boyfriend's mothers father is a family tree
+researcher, and he finds out that your cousin's daugther's father is the
+decendant of Dolores, what does that mean?<br>
+
+B: Do your friends usually answer your questions?<br>
+
+Y: If all your friends jump off a bridge would you too?<br>
+
+B: Do I get a bungy cord?<br>
+
+Y: How high do you want to bounce?<br>
+
+B: What is the name of Kim's pet dingo?<br>
+
+Y: Was it Chester?<br>
+
+B: What breakfast item does Steve always put Worcestershire sauce on?<br>
+
+Y: What item?<br>
+
+B: Orange you glad I didn't say banana?<br>
+
+Y: Is that a banana in your pocket or are you just happy to see me?<br>
+
+B: *What is like pool without pockets?<br>
+
+<p>---------------------------<p>
+<em> yellow and purple </em><br>
+
+[Y: Anybody there?<br>
+ P: Do you think we would leave our headquarters ungaurded?]<br>
+[P: Anyone up this late?]<br>
+
+Y: Well, I think so, Brain, but if Jimmy cracks corn, and no one cares, why does
+he keep doing it?<br>
+
+P: Why does anyone keep doing anything?<br>
+
+Y: When Willy was 5, which President did he meet at the Easter Egg Roll?<br>
+
+P: *Who is the current president of the United States?<br>
+
+Y: You're not going to start with the president jokes, are you?<br>
+
+P: I think so, Brain, but me and Pippi Longstocking -- I mean, what would the
+children look like?<br>
+
+Y: Do you know what a monkey's uncle looks like?<br>
+
+P: Does it look anything like a mule's uncle?<br>
+
+Y: Mares eat oats and does eat oats and little lambs eat ivy, a kid will eat 
+ivy to, wouldn't you?<br>
+
+P: Are you speaking english?<br>
+
+Y: What else would I speak, the language of love?<br>
+
+P: Does love taste more like honey or bittersweet chocholate?<br>
+
+Y: *Who died with that on his lips?<br>
+
+<p>---------------------------<p>
+<em> green and blue </em><br>
+
+[G: Anybody want to do the dialog puzzle?<br>
+B: Are you all set to go?]<br>
+[B: Are you ready to play the questions game?]<br>
+
+G: Umm, I think so, Brain, but what if the chicken won't wear the nylons?<br>
+
+B: What is your obsession with chickens?<br>
+
+G: What are your obsessions and darkest fears?<br>
+
+B: Can you imagine your mother bringing a clean pair of underwear to you in the middle of 7ths grade?<br>
+
+G: *Whats that movie called that stars Emma Thompson and her real life mother?<br>
+
+B: Would your mother have allowed that?<br>
+
+G: What was your childhood like?<br>
+
+B: What were you raised in a barn?<br>
+
+G: Are you done insulting me yet?<br> 
+
+B: Shall we change the topic of discussion?<br>
+
+G: What's the magic word?<br>
+
+B: And how do you want to pay for that sensitive information?<br>
+
+G: *What bank has an ATM on the corner of Vassar and mass ave?<br>
+
+B: Do you really want sludge through drifts of sleet and snow?<br>
+
+G: How much money do you think I have in my pockets?<br>
+
+B: *What is like pool without pockets?<br>
+
+
+<p>---------------------------<p>
+<em> green and purple </em><br>
+
+[G: Anybody want to do the dialog puzzle?<br>
+ P: Do you think we are waiting around here for nothing?]<br>
+[P: Anyone up this late?]<br>
+
+G: Did someone say a round latte?<br> 
+
+P: Did someone say McDonalds?<br>
+
+G: Is that not the poison of true love?<br>
+
+P: *Who died with that on his lips?<br>
+
+G: Wasn't it Romeo that took his last sip of bitterness and cold?<br>
+
+P: Did you see the movie or the play?<br>
+
+G: How did they get all those vibrent colors into it?<br>
+
+P: So am I to assume you had a crush on Leonardo DiCaprio?<br> 
+
+G: How did they get the blue in his eyes and shirts match so well?<br>
+
+<color cue> 
+P: Isn't <color> a really bad color to put in the laundry?<br>
+
+G: What are the two things that Mary uses in her laundry?<br>
+
+P: Can you imagine your mother bringing a clean pair of underwear to you in the middle of 7ths grade?<br>
+
+G: Can't you afford a maid?<br>
+
+P: What do you think of those short little maid's outfits?<br>
+
+G: What kind of girl do you think I am?<br>
+
+P: What was I thinking?<br>
+
+G: Are you thinking what I'm thinking?<br>
+
+P: I think so, Brain, but Pete Rose? I mean, can we trust him?<br>
+
+G: Was baseball an Olympic sport in Barcelona?<br>
+
+P: *What is the capital of spain?<br>
+
+<p>---------------------------<p>
+<em> blue and purple </em><br>
+
+[B: Are you ready to play the questions game?<br>
+ P: Do you think we are waiting around here for nothing?]<br>
+
+[P: Anyone up this late?]<br>
+
+B: Are you confused yet?<br> 
+
+P: Is it soup yet?<br>
+
+B:Do you know how to make spicy chicken soup?<br>
+
+P: Why did the chicken cross the road?<br>
+
+B: You can talk the talk, but can you walk the walk?<br>
+
+P: (walk the walk) What are you sniggering at?<br>
+
+B: You okay?<br>
+
+P: How come in english you park on a driveway and drive on a parkway?<br>
+
+B: Why all these questions?<br>
+
+P: What do you think you are better than me?<br>
+
+B: Why are you asking me this?<br>
+
+P: When does this game end?<br>
+
+B: Was there something you wanted to tell me?<br>
+
+P: What time is it?<br>
+
+B: Why don't you hit the road?<br>
+
+P: Can't you tell I'm solving here?<br>
+
+B: Can you give me a specific example?<br>
+
+P: Don't you think you've gone far enough?<br>
+
+B: Do you think I have gone far enough to be on sprokets?<br>
+
+P: What's a spool with sprokets?<br>
+
+B: *What is like pool without pockets?<br>
+
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/yellow.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/yellow.txt
new file mode 100644
index 0000000000000000000000000000000000000000..856ce39638da207e6b30982a7555c31cad6faa1b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_CharlotteAmalie_charlotteamalie.html/yellow.txt
@@ -0,0 +1,128 @@
+***********Yellow*********************
+
+(start) Y: Anybody there?
+
+<...anybody home>
+Y: Yes?
+
+<...hunt....>
+Y: Do you think I would tell you that?
+
+<How many....>
+Y: Are you counting this one?
+
+<Have you solved {x}?>
+Y: What kind of name is {x}?
+
+<... name?>
+Y: Does that matter?
+
+<...sign?> (standard pick up line?)
+Y: Don't you think you are being a little rude?
+
+< do you know where...>
+Y: Are you taking me somewhere?
+
+<...year....>
+Y: What, are you running for the dummy of the year contest?
+
+<....president...>
+Y: You're not going to start with the president jokes, are you?
+ 
+<whose talking about [a set of men]?>
+Y: Don't you think their wives are much more interesting?
+
+<....dialog...>
+Y: Is that the real question?
+
+<...come to mind?>
+Y: Do pig's fly?
+
+<... wood chuck...>
+Y: Why do fools fall in love?
+
+<...a fool?>
+Y: Are you?
+
+<...patronizing?>
+Y: (In patronizing tone) Who's a good dog?
+
+<Are you done...?>
+Y: What were we talking about?
+
+<...answer to life?>
+Y: The universe?
+
+<and everything?>
+Y: Is that the 6x9 question?
+
+<...number questions..>
+Y: Aren't we supposed to stick to facual questions? 
+
+<...do you want to pay...>
+Y: What bank has an ATM on the corner of Vassar and Mass ave?
+
+<...Rosencrantz...>
+Y: How do you spell relief?
+
+<...bituminous coal?>
+Y: Who died with that on his lips?
+
+<...bitterness...>
+Y: Do you want to grab a bite to eat together?
+
+<How much money...>
+Y: Can't you withdraw some?
+
+
+<...help you? | ...ready to play...>
+Y: Will it help us solve this hunt?
+
+<...sludge through...>
+Y: Well, I think so, Brain, but if Jimmy cracks corn, and no one cares, why does
+he keep doing it?
+
+<... a tv show?|... mean?>
+Y: What was Jackie Kennedy's maiden name?
+
+<...Dolores...>
+Y: So if your sister's boyfriend's mothers father is a family tree
+researcher, and he finds out that your cousin's daugther's father is the
+decendant of Dolores,, what does that mean?
+
+<...friends...>
+Y: If all your friends jump off a bridge would you too?
+
+<...bungy cord?>
+Y: How high do you want to bounce?
+
+<...pet dingo?>
+Y: Was it Chester?
+
+<...Worcestershire sauce...>
+Y: What item?
+
+<...banana?>
+Y: Is that a banana in your pocket or are you just happy to see me?
+
+
+< ...up this late?| ...unguarded... | ...sludge through... >
+Y: Well, I think so, Brain, but if Jimmy cracks corn, and no one cares, why does
+he keep doing it?
+
+<...keep doing it?>
+Y: When Willy was 5, which President did he meet at the Easter Egg Roll?
+
+<...what would the children look like?>
+Y: Do you know what a monkey's uncle looks like?
+
+
+<...anything like a mule's...>
+Y: Mares eat oats and does eat oats and little lambs eat ivy, a kid will eat 
+ivy to, wouldn't you?
+
+<....speaking english?>
+Y: What else would I speak, the language of love?
+
+<...honey or bitersweet...>
+Y: Who died with that on his lips?
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/7.wav b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/7.wav
new file mode 100644
index 0000000000000000000000000000000000000000..16aa4226bbe19e5c963422f8970348542ad1ec95
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/7.wav
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:532cbc37c8107861c25c0c2e049e6764e5c0482ba93f406e2cb43f3d64c6baca
+size 286694
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/chihuahua.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/chihuahua.html
new file mode 100644
index 0000000000000000000000000000000000000000..043557b96e6ff8c60c18eac15e7c2b60d884c612
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/chihuahua.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>Chihuahua</title>
+</head>
+<body>
+
+<h1>Chihuahua</h1>
+
+<ul style="list-style-type:none;">
+<li><a href="1.wav">1</li>
+<li><a href="2.wav">2</li>
+<li><a href="3.wav">3</li>
+<li><a href="4.wav">4</li>
+<li><a href="5.wav">5</li>
+<li><a href="6.wav">6</li>
+<li><a href="7.wav">7</li>
+<li><a href="8.wav">8</li>
+<li><a href="9.wav">9</li>
+<li><a href="10.wav">10</li>
+<li><a href="11.wav">11</li>
+<li><a href="12.wav">12</li>
+<li><a href="13.wav">13</li>
+<li><a href="14.wav">14</li>
+<li><a href="15.wav">15</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..4caef059b39dc710a311a4455ff69dae485920a5
Binary files /dev/null and b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Chihuahua_chihuahua.html/solution.html differ
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/christchurch.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/christchurch.html
new file mode 100644
index 0000000000000000000000000000000000000000..d7bd9ef21c2991bd566ed65131c2d23dd0cd1bb5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/christchurch.html
@@ -0,0 +1,34 @@
+<html>
+<head>
+<title>Christchurch</title>
+</head>
+<body>
+
+<h1>Christchurch</h1>
+
+<p>We have been informed that VILE is having a party. We would like you 
+to go to Twenty Chimneys at *time TK* disguised as a crook, and talk
+to all of the VILE members you meet there. Remember to take notes, but
+try to do so discreetly. If your team name is in the first half of the
+alphabet, please bring something (healthy) to eat, and napkins. If your
+team name is in the second half of the alphabet, please bring something
+(non-alcoholic) to drink, and cups.</p>
+
+<p><i>Archivist's Note</i>: When teams attended the V.l.L.E. party in 20 Chimneys, they found that certain crooks (like the ones for
+whom Acme has dossiers) subtly dropped the following bits of information:</p>
+<ul style="list-style-type:none;">
+<li>"Richard I. Mateles ratted on Joe F. Moore"</li>
+<li>"Joe F. Moore ratted on Paul P. Shepherd"</li>
+<li>"Paul P. Shepherd ratted on Donald R. Miller"</li>
+<li>"Donald R. Miller ratted on Richard I. Mateles"</li>
+<li>"Gordon K. Lister ratted on Evelyn L. Dawes"</li>
+<li>"Evelyn L. Dawes ratted on Robert Taylor Dawes (her own husband!)"</li>
+<li>"Irv and Jean Pashkowitz ratted on Clayton Simpson Robinson"</li>
+<li>"Clayton Simpson Robinson ratted on Agent 1967"</li>
+</ul>
+<p>If they were paying close attention (or if they were just in the room at all), they would also have noticed
+many references to the words "chair," "lecture," and "connection."</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..062ddfad081f7a80c945f138fbffbdff56de2216
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Christchurch_christchurch.html/solution.html
@@ -0,0 +1,21 @@
+<html>
+<head>
+<title>Christchurch: Solution</title>
+</head>
+<body>
+<h1>Christchurch: Solution</h1>
+
+<p>The solution was to go to 10-250, the large lecture hall with the purple seats and names of sponsors on
+the backs of the seats. If you look for each of the names mentioned above, and draw the appropriate
+connections between the rat and the rattee, you'll get the following pattern in the seats:</p>
+
+<pre>
+<---^
+|   | ^-> ^->
+|   | |   |
+v---> |   |
+</pre>
+
+<p>The answer to the puzzle is <strong>ORR</strong>.</p>
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/luxembourg.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/luxembourg.html
new file mode 100644
index 0000000000000000000000000000000000000000..a14c4f8954d7e77e97bdeeda6578feb1814cb216
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/luxembourg.html
@@ -0,0 +1,114 @@
+<html>
+<head>
+<title>Luxembourg</title>
+</head>
+<body>
+
+<h1>Luxembourg</h1>
+
+<p>Black to Mate in 2</p>
+
+<table border="1" cellspacing="0" cellpadding="0">
+  <tr>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e<br>
+      <img border="0" src="bking.gif" width="70" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">c</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">f</td>
+    <td width="70" valign="top" align="left" height="70">w</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">d</td>
+    <td width="70" valign="top" align="left" height="70">g<br>
+      <img border="0" src="brook.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">q</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">w<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">h<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">s</td>
+    <td width="70" valign="top" align="left" height="70">l</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">k<br>
+      <img border="0" src="wqueen.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">b</td>
+    <td width="70" valign="top" align="left" height="70">c<br>
+      <img border="0" src="bbishop.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">e</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">d</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">m<br>
+      <img border="0" src="bknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">e<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">o</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">t</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">f</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">t</td>
+    <td width="70" valign="top" align="left" height="70">w</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">p<br>
+      <img border="0" src="bbishop.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">j</td>
+    <td width="70" valign="top" align="left" height="70">n<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">u</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">h</td>
+    <td width="70" valign="top" align="left" height="70">r</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">d</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">a</td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">c</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">w</td>
+    <td width="70" valign="top" align="left" height="70">o</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">x<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">i<br>
+      <img border="0" src="wknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">d<br>
+      <img border="0" src="bknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">f</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">o<br>
+      <img border="0" src="wknight.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">s</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">a</td>
+    <td width="70" valign="top" align="left" height="70">c<br>
+      <img border="0" src="bqueen.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">i</td>
+    <td width="70" valign="top" align="left" height="70">j<br>
+      <img border="0" src="wrook.gif" width="65" height="50"></td>
+  </tr>
+</table>
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..429ad80c4dbca82c20fff065831609058ff06c9a
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Luxembourg_luxembourg.html/solution.html
@@ -0,0 +1,120 @@
+<html>
+<head>
+<title>Luxembourg: Solution</title>
+</head>
+<body>
+<p>
+<h1>Luxembourg: Solution</h1>
+
+<p>There are five positions the white king can be in which allow black to mate
+in 2, assuming both players make their best moves: e3, f2, f3, h3, h4. These are
+shown highlighted below. The letters in these squares are c, r, i, o, d, which
+anagram to <strong>DORIC</strong>.</p>
+
+
+
+<table border="1" cellspacing="0" cellpadding="0">
+  <tr>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e<br>
+      <img border="0" src="bking.gif" width="70" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">c</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">f</td>
+    <td width="70" valign="top" align="left" height="70">w</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">d</td>
+    <td width="70" valign="top" align="left" height="70">g<br>
+      <img border="0" src="brook.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">q</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">w<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">h<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">s</td>
+    <td width="70" valign="top" align="left" height="70">l</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">k<br>
+      <img border="0" src="wqueen.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">b</td>
+    <td width="70" valign="top" align="left" height="70">c<br>
+      <img border="0" src="bbishop.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">e</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">d</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">m<br>
+      <img border="0" src="bknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">e<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">o</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">t</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">f</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">t</td>
+    <td width="70" valign="top" align="left" height="70">w</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">p<br>
+      <img border="0" src="bbishop.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">j</td>
+    <td width="70" valign="top" align="left" height="70">n<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">u</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">h</td>
+    <td width="70" valign="top" align="left" height="70">r</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0"><b><i><u><font color="#FF0000">d</font></u></i></b></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">a</td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0"><b><i><u><font color="#FF0000">c</font></u></i></b></td>
+    <td width="70" valign="top" align="left" height="70"><b><i><u><font color="#FF0000">i</font></u></i></b></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">w</td>
+    <td width="70" valign="top" align="left" height="70"><b><i><u><font color="#FF0000">o</font></u></i></b></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">x<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">i<br>
+      <img border="0" src="wknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">d<br>
+      <img border="0" src="bknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0"><b><i><u><font color="#FF0000">r</font></u></i></b></td>
+    <td width="70" valign="top" align="left" height="70">f</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">o<br>
+      <img border="0" src="wknight.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">s</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">a</td>
+    <td width="70" valign="top" align="left" height="70">c<br>
+      <img border="0" src="bqueen.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">i</td>
+    <td width="70" valign="top" align="left" height="70">j<br>
+      <img border="0" src="wrook.gif" width="65" height="50"></td>
+  </tr>
+</table>
+
+</body>
+</html>
+
+
+
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diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/manila.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/manila.html
new file mode 100644
index 0000000000000000000000000000000000000000..85d857c1509d3e538dcfbed04d02f78bdb553add
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/manila.html
@@ -0,0 +1,87 @@
+<html>
+<head>
+<title>Manila</title>
+</head>
+<body>
+
+<h1>Manila</h1>
+
+
+<table border="0" cellspacing="4" cellpadding="3">
+  <tr>
+    <td><a href="321741.mid">A</a></td>
+    <td><a href="412357.mid">A</a></td>
+    <td><a href="831311.mid">A</a></td>
+    <td><a href="761902.mid">A</a></td>
+  </tr>
+  <tr>
+    <td><a href="540002.mid">E</a></td>
+    <td><a href="901233.mid">E</a></td>
+    <td><a href="133342.mid">E</a></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="402233.mid">G</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="031771.mid">H</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="541230.mid">L</a></td>
+    <td><a href="876542.mid">L</a></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="345890.mid">M</a></td>
+    <td><a href="787822.mid">M</a></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="005490.mid">O</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="629019.mid">P</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="690842.mid">R</a></td>
+    <td><a href="148147.mid">R</a></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="514425.mid">S</a></td>
+    <td><a href="913785.mid">S</a></td>
+    <td><a href="408758.mid">S</a></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="425498.mid">T</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="383698.mid">Y</a></td>
+    <td><a href="494737.mid">Y</a></td>
+    <td><a href="098236.mid">Y</a></td>
+    <td></td>
+  </tr>
+</table>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..3973eec7040076c2cb465e4edf7a2b24fee3c011
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Manila_manila.html/solution.html
@@ -0,0 +1,63 @@
+<html>
+<head>
+<title>Manila: Solution</title>
+</head>
+<body>
+<p>
+<h1>Manila: Solution</h1>
+
+<p>First, identify all of the Beatles songs.</p>
+<ul>
+<li>A: For No One</li>
+<li>A: It Won't Be Long</li>
+<li>A: Sun King</li>
+<li>A: You Never Give Me Your Money</li>
+<li>E: Dear Prudence</li>
+<li>E: Long Tall Sally</li>
+<li>E: Love Me Do</li>
+<li>G: Long, Long, Long</li>
+<li>H: Honey Don't</li>
+<li>L: All You Need is Love</li>
+<li>L: Blackbird</li>
+<li>M: Back in the USSR</li>
+<li>M: Martha My Dear</li>
+<li>O: Chains</li>
+<li>P: Within You Without You</li>
+<li>R: One After 909</li>
+<li>R: Tell Me Why</li>
+<li>S: Baby's in Black</li>
+<li>S: Here Comes the Sun</li>
+<li>S: Why Don't We Do It in the Road?</li>
+<li>T: A Taste of Honey</li>
+<li>Y: Do You Want to Know a Secret?</li>
+<li>Y: Don't Pass Me By</li>
+<li>Y: Get Back</li>
+</ul>
+
+<p>One song, "Chains", hints at the next step but is otherwise unused. All of the other song titles can overlap first and/or last words with other songs to make chains of length 2 or 3.</p>
+
+<ul>
+<li>AGE: It Won't Be Long, Long, Long Tall Sally</li>
+<li>AR: For No One After 909</li>
+<li>LEY: All You Need is Love Me Do You Want to Know a Secret?</li>
+<li>ME: Martha My Dear Prudence</li>
+<li>PA: Within You Without You Never Give Me Your Money</li>
+<li>RS: Tell Me Why Don't We Do It in the Road?</li>
+<li>SA: Here Comes the Sun King</li>
+<li>SL: Baby's in Blackbird</li>
+<li>THY: A Taste of Honey Don't Pass Me By</li>
+<li>YM: Get Back in the USSR</li>
+</ul>
+
+<p>The resulting two- and three-letter strings can then similarly be chained.</p>
+
+<ul>
+<li>PA-AR-RS-SL-LEY</li>
+<li>SA-AGE</li>
+<li>THY-YM-ME</li>
+</ul>
+
+<p>These are three of the four herbs from the refrain of Scarborough Fair; the missing link is <strong>ROSEMARY</strong>.</p>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/montevideo.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/montevideo.html
new file mode 100644
index 0000000000000000000000000000000000000000..b047dd1cc9d99b66bb2cf0ad126f1c15ef92999e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/montevideo.html
@@ -0,0 +1,23 @@
+<html>
+<head>
+<title>Montevideo</title>
+</head>
+<body>
+
+<h1>Montevideo</h1>
+
+<p>Prozac = 4112</p>
+
+<ul style="list-style-type:none;">
+<li>808</li>
+<li>1345</li>
+<li>1345</li>
+<li>5405</li>
+<li>5604</li>
+<li>8348</li>
+<li>8439</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..379fcb99d418822c5c9d6eecefdeb982471ea160
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Montevideo_montevideo.html/solution.html
@@ -0,0 +1,27 @@
+<html>
+<head>
+<title>Montevideo: Solution</title>
+</head>
+<body>
+
+<h1>Montevideo: Solution</h1>
+
+<p>As hinted by the example (4112 &rarr; fluoxetine aka Prozac), look up
+the numbers in the Merck Index (12th ed.)  They all reference either
+single elements or 1:1 compounds of two distinct elements.</p>
+
+<p>Take the atomic number of each element and index into the alphabet.
+Random anagramming gives the answer FREQUENCY.</p>
+
+<table>
+<tr><td> 808</td><td>Argon           </td><td>Ar   </td><td>18  </td><td><strong>R</strong></td></tr>
+<tr><td>1345</td><td>Boron           </td><td>B    </td><td>5   </td><td><strong>E</strong></td></tr>
+<tr><td>1345</td><td>Boron           </td><td>B    </td><td>5   </td><td><strong>E</strong></td></tr>
+<tr><td>5405</td><td>Lithium Chloride</td><td>Li/Cl</td><td>3/17</td><td><strong>CQ</strong></td></tr>
+<tr><td>5604</td><td>Manganese       </td><td>Mn   </td><td>25  </td><td><strong>Y</strong></td></tr>
+<tr><td>8348</td><td>Scandium        </td><td>Sc   </td><td>21  </td><td><strong>U</strong></td></tr>
+<tr><td>8439</td><td>Silicon Carbide </td><td>Si/C </td><td>14/6</td><td><strong>NF</strong></td></tr>
+</table>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/sao_paulo.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/sao_paulo.html
new file mode 100644
index 0000000000000000000000000000000000000000..49b12be1ee664b136f065a36e2d76453ba9b8b86
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/sao_paulo.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>Sao Paulo</title>
+</head>
+<body>
+
+<h1>Sao Paulo</h1>
+
+
+<p>Spoonternyms are two words that are spoonerized antonyms, like
+"whack" and "blight". For each of the words below, find its spoonternym.
+Arrange these new words in alphabetical order and extract the
+6th, 9th, 14th, 17th, 19th, 27th and 30th
+letters and rearrange those to form the final answer.</p>
+
+<ul style="list-style-type:none;">
+<li>bricks</li>
+<li>cell</li>
+<li>gate</li>
+<li>hiss</li>
+<li>hold</li>
+<li>mess</li>
+<li>sigh</li>
+<li>that</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..f3c6911a9db1787e1c99bbf8779f78f4176b04c1
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Sao_Paulo_sao_paulo.html/solution.html
@@ -0,0 +1,31 @@
+<html>
+<head>
+<title>Sao Paulo: Solution</title>
+</head>
+<body>
+<p>
+<h1>Sao Paulo: Solution</h1>
+
+
+<p>The spoonternyms are:</p>
+<ul style="list-style-type:none;">
+<li>bricks ~ FAKE (fix/break)</li>
+<li>cell ~ WICK (well/sick)</li>
+<li>gate ~ STRAY (straight/gay)</li>
+<li>hiss ~ MITT (miss/hit)</li>
+<li>hold ~ COT (cold/hot)</li>
+<li>mess ~ LORE (less/more)</li>
+<li>sigh ~ BELL (buy/sell)</li>
+<li>that ~ FIN (fat/thin)</li>
+</ul>
+
+<p>Arrange these in alphabetical order and take the indicated letters:</p>
+<ul style="list-style-type:none;">
+<li>bell, cOt, fAke, fiN, loRe, Mitt, straY, wiCk = OANRMYC</li>
+</ul>
+
+<p>This anagrams to <strong>ACRONYM</strong>.</p>
+
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/seoul.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/seoul.html
new file mode 100644
index 0000000000000000000000000000000000000000..8644ffae40ec7c8a71c8832808cea09104958ec0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/seoul.html
@@ -0,0 +1,130 @@
+<html>
+<head>
+<title>Seoul</title>
+</head>
+<body>
+
+<h1>Seoul</h1>
+
+<p>Ak Mi says, "As instructed, I was pretending to be a tourist admiring
+the Kwanghwamun Gate when a squadron of cadets marched past. The last cadet
+in line looked at me, winked, and dropped a piece of paper into a trash
+receptacle. I retrieved it and it turned out to be a crossword puzzle which
+is much too difficult for me to solve. I'm sure it's a clue to the location
+of the VILE headquarters in Seoul."</p>
+
+
+<FONT FACE="Courier New" SIZE=2><P><IMG SRC="seoul.gif"></P>
+<div style="display:inline-block; width:45%;">
+<BR><strong>Across</strong>
+<BR>1 Hickory fruit
+<BR>7 Censors
+<BR>12 Identical
+<BR>16 Missile type
+<BR>17 Mayan month
+<BR>18 Salzburg tourist village
+<BR>19 Seem
+<BR>20 Lamp contents, sometimes
+<BR>21 Hebrew prince
+<BR>22 FDA office responsible for oversight of the Prescription Drug User Fee Act
+<BR>23 Cocoon inhabitant
+<BR>25 Marred
+<BR>27 Goof
+<BR>28 Sane
+<BR>31 A Hawaiian timber tree
+<BR>32 Sea serpent's home?
+<BR>34 Ridicule
+<BR>36 Buckthorn
+<BR>40 Christie plot
+<BR>44 ___ Chi
+<BR>45 Portuguese noble
+<BR>48 Sped
+<BR>49 UniSource Energy Corporation (abbr.)
+<BR>50 Greek letter
+<BR>51 Chow
+<BR>53 Liner
+<BR>54 Cal broke his record
+<BR>55 Family vehicle
+<BR>56 Curved
+<BR>58 Hearts
+<BR>60 Yalie
+<BR>61 Bugs' dessert?
+<BR>63 "The Adventures of ___ Bartmoss" (pseudo-e-zine)
+<BR>65 A member of a certain Peruvian tribe
+<BR>66 Tropical American dog
+<BR>70 From (suff.)
+<BR>72 Lascivious one
+<BR>75 Clod
+<BR>76 Pertaining to butt muscles
+<BR>80 Thought
+<BR>81 Afghan currency unit
+<BR>82 Tilt
+<BR>83 Kudo
+<BR>86 An acrylic plastic
+<BR>88 Aoudad
+<BR>89 Urticaria
+<BR>90 EuroLaser Academy Network for Educational Tools (abbr.)
+<BR>91 Marmaduke, e.g.
+<BR>92 Mayan dialect
+<BR>93 Sun ___ (Bicycle racing component manufacturer)
+</div>
+<div style="display:inline-block; width:45%;">
+<strong>Down</strong>
+<BR>1 Appreciator of certain pheasant displays?
+<BR>2 Die
+<BR>3 Dealers
+<BR>4 Acme nom?
+<BR>5 Certain tides
+<BR>6 Swell
+<BR>7 Imaginary problem
+<BR>8 Rest
+<BR>9 Place to stay
+<BR>10 Shelled out
+<BR>11 Glossy
+<BR>12 An Israelitish subtribe (Ezra, Nehemiah)
+<BR>13 Bead computer (var.)
+<BR>14 Junior Achievement management competition
+<BR>15 Oklahoma city
+<BR>24 Iago's lament?
+<BR>26 Front of a ship's main platform
+<BR>29 Narrow strip of wood
+<BR>30 ___ Jesse Drecker Jr. (Zimbabwe Harare Mission President 1990-1991)
+<BR>33 Convenience store
+<BR>35 Wheel of Fortune, e.g.
+<BR>37 USS ___ (SS-403)
+<BR>38 Estate
+<BR>39 ___ Writer (Hebrew/English/Yiddish word processing program)
+<BR>41 Family containing the forsythia
+<BR>42 A member of a Nigerian tribe
+<BR>43 Brown tint
+<BR>45 Temperature
+<BR>46 ___ Pilsen (beer from Peroni)
+<BR>47 ___ Technology (health care information systems company)
+<BR>52 Astronomical organization whose newsletter is "New Horizons"
+<BR>57 Venetian magistrate
+<BR>59 Parrot variety
+<BR>62 Nozzle
+<BR>64 Movie director MacDonald
+<BR>67 Jogging
+<BR>68 "And now no soil nor ___ doth besmirch the virtue of his will" (Hamlet)
+<BR>69 A eucharistic wafer
+<BR>71 Hebrew prophet
+<BR>73 Congerer
+<BR>74 A Chilean timber tree
+<BR>76 The man from ____
+<BR>77 Italian currency
+<BR>78 US Mission to the United Nations (abbr.)
+<BR>79 The monk parrot
+<BR>84 Little knots formed during ginning
+<BR>85 Harem room
+<BR>87 John
+<BR>
+<BR>
+</div>
+</FONT>
+<br><br>
+<div>
+<a href="solution.html">Solution</a>
+</div>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..d9ec0f7f7da6e20a7eeddfa0e22f96c5fc641cc7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Seoul_seoul.html/solution.html
@@ -0,0 +1,17 @@
+<html>
+<head>
+<title>Seoul: Solution</title>
+</head>
+<body>
+<p>
+<h1>Seoul: Solution</h1>
+
+<P>The crossword solution is:</P>
+<IMG SRC="seoul-sol.png">
+<P>
+The long answers are POIROTCASE, CARROTCAKE, PARROTCRY, and TAROTCARD.
+The answer is what they have in common: <strong>ROTC</strong>.</p>
+
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..49a9cf97dab4208e1774be653a723c64997ae812
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/solution.html
@@ -0,0 +1,11 @@
+<html>
+<head>
+<title>Warrant 2.1: Solution</title>
+</head>
+<body>
+<p>
+<h1>Warrant 2.1: Solution</h1>
+
+<p>The answer is <strong>DONUTS</strong>.
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/w2.1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/w2.1.html
new file mode 100644
index 0000000000000000000000000000000000000000..f66c3c01c84f1669acb1d4b1f9714b9324b3a1f0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.1_w2.1.html/w2.1.html
@@ -0,0 +1,43 @@
+<html>
+<head>
+<title>Warrant 2.1</title>
+</head>
+<body>
+
+<h1>Warrant 2.1</h1>
+
+<p>Come to us and complete 10 of the following:</p>
+<ul>
+<li>interpretive dance</li>
+<li>human pyramid</li>
+<li>homemade silly putty</li>
+<li>hokey pokey</li>
+<li>do you want to buy a duck</li>
+<li>backrubs</li>
+<li>sing patter</li>
+<li>children's song with motions</li>
+<li>simon says</li>
+<li>four-square</li>
+<li>tell us a story in proto-indo-european</li>
+<li>beat team member at pocket fighter</li>
+<li>make something out of clay</li>
+<li>teach us how to do something</li>
+<li>1000 paper cranes</li>
+<li>sculpture out of Great Stuff</li>
+<li>telephone</li>
+<li>recite the Arpawocky</li>
+<li>role-playing</li>
+<li>do a skit</li>
+<li>who were you in past life??</li>
+<li>tell our fortune/read tarot</li>
+<li>make natal chart for team member</li>
+<li>knit us something</li>
+<li>recite onefish twofish redfish bluefish</li>
+<li>puppet show</li>
+<li>sing alphabet backward without pause</li>
+<li>at least 3 foreign language proverbs and translations</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..a5a64db88a033751525a8df644c434957c1514ca
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/solution.html
@@ -0,0 +1,81 @@
+<html>
+<head>
+<title>Warrant 2.2: Solution</title>
+<style>
+table {
+	border-collapse: collapse;
+}
+
+td {
+	border: 1px solid #333;
+	padding: 10px;
+}
+</style>
+</head>
+<body>
+<h1>Warrant 2.2: Solution</h1>
+
+<p>The English translations with Klingon transcriptions are:</p>
+<table>
+	<tr>
+		<td>#</td>
+		<td>Saying</td>
+		<td>Klingon</td>
+		<td>English</td>
+	<tr>
+<tr>
+	<td>1</td>
+<td>A stitch in time saves nine</td>
+<td>Sibi' wa'logh ti'lu'chugh vaj Hutlogh ti'niSlu'be'</td>
+<td>If a repair is made right away,
+it won't be necessary to make nine repairs.</td>
+</tr>
+<tr>
+	<td>2</td>
+<td>The twelve days of Christmas</td>
+<td>*QISmaS wa'maH cha' jaj</td>
+<td>The twelve days of Christmas</td>
+</tr>
+<tr>
+	<td>3</td>
+<td>Four and twenty blackbirds baked in a pie</td>
+<td>chabDaq cha'maH loS toQ qij luvutlu'bogh</td>
+<td>Twenty-four cooked black birds-of-prey in a pie</td>
+</tr>
+<tr>
+	<td>4</td>
+<td>Snow White and the Seven Dwarfs</td>
+<td>*peDchiS Soch nuvHom je</td>
+<td>and the seven small humanoids</td>
+</tr>
+<tr>
+	<td>5</td>
+<td>She was just seventeen, if you know what I mean</td>
+<td>wa'maH Soch ben bogh neH, choyaj'a'?</td>
+<td>She was born just 17 years ago, do you understand me?</td>
+</tr>
+<tr>
+	<td>6</td>
+<td>I regret that I have but one life to give for my country</td>
+<td>wo'wijvaD wa'logh jiHeghlaH neH 'e' vipay</td>
+<td>I regret that I can only die once for my empire.</td>
+</tr>
+</table>
+
+<p>Add the numbers in the translations: 9 + 12 + 24 + 7 + 17 + 1 = 70. Written out as a word, the solution is, therefore, <strong>SEVENTY</strong></p>
+
+<hr>
+
+<em>Archivist's note:</em> The author supplied the following notes with the solution:
+<ol>
+	<li> I don't know any Klingon. A coworker of mine at Dragon systems (Mark Mandel) is a linguist who
+has extensive knowledge of Klingon. He translated and dictated the phrases for me. Thanks, Mark.</li>
+<li> This puzzle was a last minute replacement for another puzzle, which basically consisted of people
+saying these same English phrases into Dragon System's NaturallySpeaking speech recognition systems
+in various languages. The solver would be given the output of the speech recognizers. Unfortunately, the
+system uses a lot of word occurrence/co-occurrence knowledge and the results in most cases were not
+phonetically similar enough. Test solving bore this out. Maybe next time...</li>
+<li>An interesting response one team got from a Klingon expert.</li>
+</ol>
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/w2.2.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/w2.2.html
new file mode 100644
index 0000000000000000000000000000000000000000..4bb03f8d5c8a7794f7023b11a66b5edfd17dcde6
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_2Investigator_Warrants2_w2.2_w2.2.html/w2.2.html
@@ -0,0 +1,23 @@
+<html>
+<head>
+<title>Warrant 2.2</title>
+</head>
+<body>
+
+<h1>Warrant 2.2</h1>
+
+<p>I intercepted the following transmissions. I can't figure out what they
+add up to.</p>
+
+<ul style="list-style-type:none;">
+<li><a href="u1.wav">1</a></li>
+<li><a href="u2.wav">2</a></li>
+<li><a href="u3.wav">3</a></li>
+<li><a href="u4.wav">4</a></li>
+<li><a href="u5.wav">5</a></li>
+<li><a href="u6.wav">6</a></li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/athens.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/athens.html
new file mode 100644
index 0000000000000000000000000000000000000000..4159b917baa38a2ea92d164b1ca8f975d999fe9d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/athens.html
@@ -0,0 +1,18 @@
+<html>
+<head>
+<title>Athens</title>
+</head>
+<body>
+
+<h1>Athens</h1>
+
+<p>Our Athens correspondent has mailed us an audiotape for your listening 
+pleasure. Please call ACME for an appointment.</p>
+<a href ="athens.jpg">Row, Row, Row Your Boat</a>
+
+<p><i>Archivist's note</i>: Here is the <a href="athens.au">content</a> of the audiotape.</p>
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..ff4ad55cbd8510301b1d64a9ebd06f77eb2b6b62
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Athens_athens.html/solution.html
@@ -0,0 +1,12 @@
+<html>
+<head>
+<title>Athens: Solution</title>
+</head>
+<body>
+<h1>Athens: Solution</h1>
+
+<p>
+Solution needed. The answer is <strong>ARGO</strong>.
+</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/beijing.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/beijing.html
new file mode 100644
index 0000000000000000000000000000000000000000..94b724a0b0e4b0363532d3c78e1e5032f3b5cdc2
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/beijing.html
@@ -0,0 +1,74 @@
+<html>
+<head>
+<title>Beijing</title>
+</head>
+<body>
+
+<h1>Beijing</h1>
+
+<p>In the grid below, can you locate all of:</p>
+
+<ol>
+    <li> the major Hawaiian Islands?
+    <li> the diatomic gases?
+    <li> Snow White's dwarfs?
+    <li> the stage names (first only) of the Marx Brothers?
+    <li> the real last names of Lefty, Lucky, Nelson and Otis Wilbury, and of Charlie
+T. Jr.?
+    <li> the films directed by Woody Allen that have one-word titles?
+    <li> the colleges of the Ivy League?
+    <li> the Horsemen of the Apocalypse?
+    <li> the real first names of the Marx Brothers?
+    <li> the provinces and territories of Canada?
+    <li> the costumes of the Village People?
+    <li> the characters who die over the course of Hamlet?
+    <li> the rooms in "Clue"?
+    <li> the planets of our solar system?
+    <li> the sons of Jacob?
+    <li> the Deadly Sins?
+</ol>
+
+<p>Normal word search rules apply: words appear forwards, backwards, up, down, and
+diagonally.
+Note: Each word in the above list appears by itself, not within a larger word in the
+list;
+  if you are looking for COIN and find it within COINCIDENCE, keep looking.
+ A word may, however, "bridge" two other words from the list;
+  if DISCO and INUIT appear together (DISCOINUIT), that COIN counts.</p>
+
+<tt>
+<font size=+2>
+
+C P T G T F N G W H T Y U T Y W H L G L D Y T P M P<br>
+W L H W Y N A F L H X T Y W H N Q T R M N G W T N B<br>
+R Z G P M L D L F A W G K A T A F W D L N H T A O L<br>
+L H D O T N R T G I A H A L G R H L O D W I Z A T R<br>
+Y I F H N A I R I W D I X I B W G L A L P R T W Z N<br>
+L N A T B F H R G H R I H L Q N B A T P M T R R W X<br>
+A D W D P W T F H N O Z T K A N G T Q A L R H N M H<br>
+M Y G O L R A W L T G D P G I N Y G A T O H L H N N<br>
+I N W H D N I D P L O I A G A L Z H T W U N Z G H A<br>
+A J R I W H N D N B P G D L L A I T P T P G N D R G<br>
+K I P N T T R W L L I G G B I D Y P N I A D A L G P<br>
+B L M U H G L T T H W N N Y I U Y T G T P W O T A C<br>
+L F N C T G B A L D Q H B F N A N H A E L Y K G I L<br>
+L L D L D T G O N B L K L H L Z K S N R O Z P P M R<br>
+D M I H B P L A N D D V O B T L I T P W W H O L G G<br>
+R W Y L N H Y N L I Y L L I L C H F H G A W L A W G<br>
+M D F G D T F N M U L L L D G O L W T L B T T Y N L<br>
+N T W G P Y L Y H P D H A M W R H P N H P L G T H A<br>
+A G T D T L A G L R S R Z P S Z W B M H T M P H C A<br>
+H P S Y N N A D D T F W S D A A A D W G C H G C N W<br>
+L B W G P T K T W F Y I D N M N N N P K T N T W A G<br>
+D T D F L A G T G K K T N A K I I O M K W E A R E N<br>
+D H K N F C N M R K K Y V W V M D T I O W I R F L A<br>
+E T P N N D T C L W N O W H L P U B L H H K D T A W<br>
+H T Y L M W D N B A W H M L G N H V G P L Z W V R L<br>
+B A W H M L L O C T A O W R D T H O W T E N D N Y R<br>
+
+</font>
+</tt>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..5d426d0ec7832499034560c4899cb3f41396a74b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Beijing_beijing.html/solution.html
@@ -0,0 +1,125 @@
+<html>
+<head>
+<title>Beijing: Solution</title>
+</head>
+<body>
+<h1>Beijing: Solution</h1>
+
+<p>The wordsearch is a cryptogram with the following key:</p>
+<pre>
+	Ciphertext: ABCDEFGHIJKLMNOPQRSTUVWXYZ
+	Plaintext:  rpwlkbtnuqyecodhvsxafzijmg
+</pre>
+
+<p>The translated grid is:</p>
+<PRE>
+W H A T A B O T I N A M F A M I N E T E L M A H C H
+I E N I M O R B E N J A M I N O V A S C O T I A O P
+S G T H C E L E B R I T Y R A R B I L E O N A R D E
+E N L D A O S A T U R N R E T S N E D L I U G R A S
+M U B N O R U S U I L U J U P I T E R E H S A I G O
+E O R A P B N S T N S U N E V O P R A H C A S S I J
+R L I L H I A B N O D G A Y R O T A V R E S N O C N
+C M T D E S R I E A T L H T U O M T R A D N E N O O
+U O I N L O U L H E D U R T R E G N A I F O G T N R
+R Q S U I N O L O P H T L E E R U A H A H T O L S T
+Y U H O A A S I E E U T T P U L M H O U R L R E T H
+P E C F N T E A A N I O O M U F M A T A H I D A R W
+E B O W A T P R E L V N P B O R O N R K E M Y T U E
+E E L E L A T D O P E Y E N E G Y X O S D G H H C S
+L C U N P H E R O L L Z D P A E U A H I I N D E T T
+S I M E O N M O E U M E E U E W N B N T R I E R I T
+C L B T L A B O C F E E E L T D E I A E P A A M O E
+O A I T H M E M N H L N R C I S N H O N H E T A N R
+R T A L A E R T E S X S G H X G I P C N A C H N W R
+N H X M O O R L L A B I X L R R R L I T W N T W O I
+E P I T H A Y A I B M U L O C O O O H Y A O A I R T
+L A L B E R T A T Y Y A O R Y U U D C Y I K R S K O
+L N Y O B W O C S Y Y M Z I Z C L A U D I U S B E R
+K A H O O L A W E I O D I N E H F P E N N Y L A R I
+N A M E C I L O P R I N C E T O N Z T H E G I Z S E
+P R I N C E E D W A R D I S L A N D I A K O L O M S
+</PRE>
+
+<p>Probably the easiest way to get there is to take a word from the wordlist with an obvious pattern, like MANHATTAN, and place it in the grid; this will give enough letters to find another word, and so on.  The wordlist is:</p>
+<ol>
+<li>Hawaii, Kahoolawe, Kauai, Lanai, Maui, Molokai, Niihau, OAHU</li>
+<li>hydrogen, NITROGEN, oxygen, fluorine, chlorine, bromine, iodine</li>
+<li>Bashful, Doc, Dopey, Grumpy, HAPPY, Sleepy, Sneezy</li>
+<li>Chico, Harpo, Groucho, ZEPPO, Gummo [oldest to youngest]</li>
+<li>Orbison, DYLAN, Harrison, Lynne, Petty [in order]</li>
+<li>Alice, Bananas, Celebrity, INTERIORS, Manhattan, September, Sleeper, Zelig</li>
+<li>Brown, Columbia, Cornell, Dartmouth, Harvard, Penn, Princeton, YALE</li>
+<li>WAR, Famine, Pestilence, Death</li>
+<li>Leonard, Adolph, Julius, HERBERT, Milton [oldest to youngest]</li>
+<li>Alberta, British Columbia, Manitoba, NEW BRUNSWICK, Newfoundland, Northwest Territories, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon</li>
+<li>construction worker, cowboy, INDIAN, leatherman, policeman, the g.i.</li>
+<li>Claudius, Gertrude, Guildenstern, Hamlet, Laertes, Ophelia, Polonius, ROSENCRANZ</li>
+<li>ballroom, billiard room, conservatory, dining room, HALL, kitchen, library, lounge, study</li>
+<li>Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, NEPTUNE, Pluto</li>
+<li>asher, benjamin, dan, gad, issachar, joseph, judah, levi, naphtali, REUBEN, simeon, zebulun</li>
+<li>anger, envy, gluttony, greed, LUST, pride, sloth</li>
+</ol>
+
+<p>(Note on #10: Nunavut was created in 1999, after this puzzle was written.)</p>
+
+<p>As usual, read the unused letters in the wordsearch after finding the items on the list.  The leftover letters read:  "What is the last name of the author of the long poem entitled 'The Xxxx with a Yyyyyyyy Zzzz'?"  Notice that one word in each of the 16 groups is capitalized.  Those words do not appear in the grid.  Their first letters, in order, are ONHZDIYWHNIRHNRL.  Decrypting this using the same key used for the grid gives "dongluminousnose".  This makes the question above "What is the last name of the author of the long poem entitled 'The Dong with a Luminous Nose'?"  The poet is Edmund Lear, so <strong>LEAR</strong> is the answer.</p>
+
+<p>Completed grid:</p>
+<pre>
+W H A T a-b-o-t-i-n-a-m f-a-m-i-n-e t-e-l-m-a-h c h
+                                              | | |
+I e-n-i-m-o-r-b-e-n-j-a-m-i-n-o-v-a-s-c-o-t-i-a o p
+  |                                           | | |
+S g T H c-e-l-e-b-r-i-t-y-r-a-r-b-i-l-e-o-n-a-r-d e
+  |                                           | | |
+E n L d A o s-a-t-u-r-n-r-e-t-s-n-e-d-l-i-u-g r a s
+  |   |   | |                       |         | | |
+m u b n o r u s-u-i-l-u-j-u-p-i-t-e-r-e-h-s-a i g o
+| | | | | | |          /            |         |   |
+e o r a p b n S T N s-u-n-e-v o-p-r-a-h-c-a-s-s-i j
+| | | | | | |        /              |         |    
+r l i l h i a b n o d g A y-r-o-t-a-v-r-e-s-n-o-c n
+|   | | | | | |  \ X  |   |         |       | | | |
+c M t d e s r i E a t l h-t-u-o-m-t-r-a-d n e n o o
+|   | | | | | |  / \ \|   |         |     | |   | |
+u O i n l o u l h e-d-u-r-t-r-e-g-n-a i F o g T n r
+|   | | | |   |       |\  |    /|/  | |   | |   | |
+r q s-u-i-n-o-l-o-p H t l e E r u A h a h-t-o-l-s t
+| | | | | |   |       |  \|  / /|     |   | | | | |
+y u h o a a s i e e U t T p u l m H O u R l r e t h
+| | | | | | | |  X    |    / /  |\    |   | | | | |
+p e c f n t e a a n i o O m u F m a T a H i d a r w
+| | | | | | | |/   \| |  / /    |  \  |   | | | | |
+e b o w a t p r E L v n p b O r o N r k e m y t u e
+| | | | | | |/|     |\|/ /   /       \  |   | | | |
+e e l e l a t d-o-p-e-y e n-e-g-y-x-o s d G h h c s
+| | | |   |/| |     | |X   X         \ /|     | | |
+l c u n P h e r O l l z d p a E u-a-h-i-i-n d e t t
+| | |     | | |   |   |\|X   \       / \|   | | | |
+s-i-m-e-o-n m o e u M e e u E w N b n T r I e r i t
+  | |     | | | | |   |/|\ \   \   X \  |\  | | | |
+c l b T L a b o c f E e e l t D e i a e p a a m o e
+| | |     | | | | |  /| |  \ \  |X   \ \   \| | | |
+o a i T H m e m n h l n r c i s n h o n h E t a n r
+| | |       |   | |/  | | |  \ /| |\|  \|\  |\| | |
+r t a l-a-e-r-t-e-s X s g h X g i p c n a c h n w r
+| |             | |       |  /| | | |\ \|\ \   \| |
+n h X m-o-o-r-l-l-a-b i X l r r r l i t w n t W o i
+| |             | |   |   |/  | | | |  \|\|\ \  | |
+e p I T H A Y a-i-b-m-u-l-o-c o o o h Y a o a i r t
+| |             |     |  /|   | | | |   |\|\ \ \| |
+l a-l-b-e-r-t-a t Y Y a o r Y u u d c Y i k r s k o
+| |             |     |/  |   | | |     | |\ \  | |
+l n y-o-b-w-o-c s Y Y m Z i Z c-l-a-u-d-i-u-s b e r
+                |         |   | |         |  \  | |
+k-a-h-o-o-l-a-w-e i-o-d-i-n-e h f p-e-n-n-y-l a r i
+                |         |   |                \  |
+n-a-m-e-c-i-l-o-p-r-i-n-c-e-t-o-n Z t-h-e-g-i Z s e
+                                                  |
+p-r-i-n-c-e-e-d-w-a-r-d-i-s-l-a-n-d i-a-k-o-l-o-m s
+</pre>
+
+</BODY>
+</HTML>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/bogota.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/bogota.html
new file mode 100644
index 0000000000000000000000000000000000000000..12292ab94ec6e115d3a257129f3422eee1ff4ccd
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/bogota.html
@@ -0,0 +1,62 @@
+<html>
+<head>
+<title>Bogota</title>
+</head>
+<body>
+
+<h1>Bogota</h1>
+
+<p>
+there's still so much for me to do, and to know, and to be and to feel i
+can tell you i'm the law with my medals from the war so don't tell me what
+to do with my narrow point of view hit me in the morning hit me in the
+night hit me when I'm wrong hit me when I'm the man in the crowd with the
+multicolored mirrors on his hobnail boots they raise the price of oil and
+they censor our mouths with six high definition nozzles and adaptor with a
+fifteen inch food decorating bag with three piping nozzles and in the glow
+of the moon know my deliverance will come soon can't tell how long you're
+gone can't tell how long you stay feels like I'm living in a world gone mad
+look around, all around it's just the same send me a signed, tell me your
+feelings are just as real you say you don't believe a thing I say, I say
+you don't believe a thing devoid of worries no love is forlorn when i'm
+feeling blue, all i have to do is take a look at you then i'm not so blue
+hard luck girl, your peace of mind must seem a long time coming sometimes
+lovers stay too long sometimes they leave too soon there's only one thing
+left to do it's come back 'round to you
+</p>
+<p>
+I'm on a bus on a psychedelic trip reading murder books tryin' to stay hip
+the bigger the city well, the brighter the lights the bigger the dog well,
+the harder the bite these things go through your head when there's a man on
+your back and you're pushed flat on your stomach it's not a classic
+cadillac nd he saves the day and the world knows now watch his head explode
+and you know you better watch your step or you're gonna get hurt yourself
+for most of my life I've been a fool and you know what a fool can do
+roughneck man me no want none a dat beat up me body, lick off me head top
+day-glo paint on an electric chair electric dye in her lover's hair
+backstage, under age, adolescent how ya doin? fine, sugar pie, I like to do
+the wild thing in a year or maybe two, we'll be gone and someone new will
+take our place they're so good at making soldiers but they're not so good
+at making men we were young and we were pure and life was just an open door
+I don't ask a lot girl but I know one thing's for sure it's the love I
+haven't got girl and I just can't take it anymore I'll take you to the
+highest mountain to the depths of the deepest sea
+</p>
+<p>
+they look so natural together, just like two newlyweds should be is there a
+canopy in store for me my head's got a hole in it and everything's been
+ruined by the rain pack and pick the ping pong starter jewels cleaving skin
+between breasts I am standing up at the water's edge in my dream I cannot
+make a single sound as you scream power she's a dangerous seductress I
+don't care if you're another Rudolph Valentino just like you we'll wind up
+in the ocean one more sacred lover that I shot dead shadow in my heart is
+tearing me apart you can go ahead now little darling, 'cause I want you to
+have your way honey, how long was I laughing in the rain with you he
+protected his feelings in walls he imagined but castles crumble exposing
+the frightened child runnin' through the night I can make it right it's
+comin' on like thunder
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..eb061525fdfcd39a85853e5a7782626ced3c7dfc
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Bogota_bogota.html/solution.html
@@ -0,0 +1,13 @@
+<html>
+<head>
+<title>Bogota: Solution</title>
+</head>
+<body>
+<h1>Bogota: Solution</h1>
+
+<p>Each paragraph was a list of song lyrics. When one found the titles to all the songs (a task made considerably more difficult by the NMPA's shutdown of the International Lyrics Server) one could conjoin all the titles in each paragraph to form a chain, with two ends that didn't connect to anything. When one searched the lyrics of the offending songs, one found a common word. The first paragraph's
+word was National, the secone Public, and the third Radio, to give you <strong>NATIONAL PUBLIC RADIO</strong>.</p>
+
+
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/capetown.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/capetown.html
new file mode 100644
index 0000000000000000000000000000000000000000..0b1a038eea8f6cdf6cb884a38e248962dd23b024
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/capetown.html
@@ -0,0 +1,141 @@
+<html>
+<head>
+<title>Capetown</title>
+</head>
+<body>
+
+<h1>Capetown</h1>
+
+<center>
+<p><h2>He who finds the cheese will win!</h2></p>
+<IMG SRC="mice1.jpg"></center>
+
+<p>Three mice are set loose one at a time in a maze. They each try to
+document their time in different ways. The maze fits within a 6 by 13
+grid. Not every mouse traverses every square (you can get the unique
+answer anyhow).</p>
+
+<h2>Blinky</h2>
+
+<p>NOTE: Pictures are not shown in the order taken.</p>
+<p><IMG SRC="maze3.jpg"></p>
+<p><IMG SRC="maze2.jpg"></p>
+<p><IMG SRC="maze4.jpg"></p>
+<p><IMG SRC="maze1.jpg"></p>
+<p><IMG SRC="maze5.jpg"></p>
+
+<hr>
+<br>
+<h2>Jottie</h2>
+
+<p>
+I woke up to unfamiliar magenta walls and a blue floor lit from above
+with wide spotlights. I had a moment of panic when I realized I had my
+trusty blue pen, but no notepad beside me. I would have to rely on my
+memory. You see it was my first assignment as a new reporter for the
+Lab Rat Rag and I was in a new maze.  The first thing I saw was that I
+was at the dead end of a hallway extended out in front of me. I
+decided that a smart move would be to mark my way on the floor, so if
+I ever came that way a second time I would not go the same way
+twice. But to save ink (and time) I would only mark which way I went
+if there was a choice.
+</p>
+<p>
+I went a little ways along the hallway. Soon there was an opening on
+my left and the hallway ahead looked like it deadended a ways forward
+so I drew an arrow on the floor pointing left and turned to go through
+the opening.
+</p>
+<p>
+To my dismay I then stepped out into a hallway that was completely
+dark in both directions (it stretched out to my left and to my right).
+ wasn't sure which direction to go but the left looked shorter so I
+bent down to make an arrow, but my pen didn't show up in the darkness
+and I had to pause and think about my maze algorithms class for a
+minute. I reasoned that it would be safest if I always took the
+leftmost branch when I couldn't mark my way.
+</p>
+<p>
+When I reached the end of the hallway there was an opening on my right
+which I took (there being no other choice). But no sooner had I
+stepped out of the dark hallway, then I had another choice: Right or
+straight ahead. My first impulse was to turn right since straight
+ahead looked like more darkness and I wanted to be able to use my
+pen. But when I looked down the hallway to my right I saw no openings,
+so I sighed and continued on forward into the darkness (first marking
+the direction I followed on the ground).
+</p>
+<p>
+Once entering this new dark hall I realized immediately I would have
+to turn right. I did so and walked glumly down the long hall. At the
+end I had to turn left.
+</p>
+<p>
+The area in front of me was lit. I was so relieved I marked my way
+even though I had no choice. I had to go straight... into
+another dark hallway, this time leading off to the left.
+</p>
+<p>
+About halfway down it I came to an opening on my left. I followed my
+"choice in the dark" rule and turned into the opening.  After turning
+there was a short hallway to my left. But it seemed to be a dead end
+so I turned around and went back out into the long dark hall.
+</p>
+<p>
+I continued on to my left (the same direction I had been going prior
+to the last little "in the dark choice") and immediately saw another
+opening on my left. I took this one too, but all it had was a small
+dark cubbyhole on the right. Exasperated I went back out into the long
+hall. Only all of a sudden I realized I was almost at the end of it,
+so I continued to the end and turned right and out under another
+light.
+</p>
+<p>
+Ahead of me was yet another dark hallway! This time stretching right
+again. I was starting to sense a pattern here and I tell you I was
+getting sick of it. I went a little ways down it and soon found light
+openings on both my right and left. I choose left, just to be
+consistent, you understand. It was a short hallway stretching to the
+right. I could see that there were no other exits, but I thought I saw
+something on the floor at the end, so I went to investigate.
+</p>
+<p>
+It wasn't the cheese scoop that would have assured my career, but I
+was happy enough after I saw it, because it was this piece of paper. I
+decided I had better take the opportunity to record what had happened
+so far since I was already starting to forget.
+</p>
+<p>
+Next I will go back over it all and make a map and continue on. Well
+maybe after I take a nap...
+</p>
+
+
+<hr>
+<br>
+<h2>Milton</h2>
+
+<p>NOTE: Milton has short legs. However, an integral number of his steps
+do fit within one wall segment.</p>
+
+
+<!--important for this to be in non-proportional font-->
+<pre>
+
+  2   1   1                      2           2             1   
+3 | 6 ^ 3 ^ 15 v 2 v 17 v 8 v 14 | 6 v 2 v 5 | 15 v 8 v 14 ^ 3 
+
+
+1   2               2               2            1   1   2    
+^ 3 | 3 v 2 v 5 v 2 | 3 v 8 v 2 v 5 | 6 v 8 v 14 ^ 3 ^ 3 | 3 v 
+
+
+          2               2
+2 v 5 v 2 | 3 v 8 v 2 v 5 | 6
+</pre>
+
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..431e5f05998b4ac78d309f5d6e8bbb0f0e016dc9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Capetown_capetown.html/solution.html
@@ -0,0 +1,61 @@
+<HTML><HEAD><TITLE>Capetown: Solution</TITLE></HEAD>
+<BODY><H1>Capetown:Solution</H1>
+
+<p>
+Milton is using the right-hand-wall method. 3 of his steps make one wall
+segment. ^ and v symbols in his transcription indicate turns, and | indicates
+where a wall ends and he makes two turns in a row. When he makes a right turn,
+Milton takes an extra step, indicated by a 1 above the arrow for it. When he
+goes around the end of a wall, this takes 2 steps, also as indicated. When he
+is forced to make a left turn, he takes one less step in the next segment
+because, due to the size of his body, he started one step into the first
+segment. Using his moves, you can reconstruct much of the maze:
+<br>
+<IMG SRC="capetown1.png">
+<P>
+With this done, you can make more sense of Jottie's notes, assuming the
+same starting point. Jottie does not finish the maze, stopping to write down
+the story at the piece of paper (marked "P" below):<BR>
+<IMG SRC="capetown2.png">
+<p>
+With the doorways we already know, the only place where the long corridor
+seen in Blinky's third photo, dead-ending with at least 3 squares of walls
+on both sides in a corridor that appears 6 spaces long, is at the far left.
+This tells us some more light and dark over there.
+<p>
+Also, the only place that has the collection of three doorways, none at a
+corner, seen in photo 2 is in the section of corridor where Jottie finished.
+With the faint bits of light seen at the edges of the far doorways, we know
+all five of the spaces in the dead ends beyond those doorways are lit.
+<p>
+Now the fourth photo cannot be this same hallway because there is no doorway
+on the right in the photo. It cannot be the hallway to the left of this in
+the maze since that hallway does not have the opening to the left at the end.
+None of the hallways further left have the two doorways together seen here.
+The hallway to the right of the one Jottie finished in does not have room for
+these doorways either. Only the right-most hallway matched what can be seen
+here, so we know three squares of light and a bunch more darkness.
+<p>
+The hallway in the last photo cannot be any of the four totally dark ones
+Jottie traveled, since it had light, and it does not match either end hallway,
+so it is the hallway just right of Jottie's finishing point. This confirms
+two more squares of light and some more darkness.
+<p>
+Now we know the entire maze pattern, and there are only three places with the
+side-by-side doorways seen in the first photo. Two of them we know do not have
+the one square of darkness seen through the far doorway, so this must be the
+left-most of the three pairs of doorways. Jottie neglected to tell us about
+the lighting conditions in the lower of these two doorways, but now we know.<br>
+<IMG SRC="capetown3.png">
+<p>
+We still don't know the light state of a few spaces at the lower right, but
+we know enough. The walls of the maze form letters spelling CHEESE. But that
+is not the answer; it's too obvious, and even Jottie knew there would be
+cheese in the maze. The darkened areas also form letter shapes spelling <strong>JAM</strong>,
+and that is the answer.<br>
+<img src="solution.jpg">
+
+
+</BODY>
+</HTML>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/colombo.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/colombo.html
new file mode 100644
index 0000000000000000000000000000000000000000..7977d4ccd832899451d50c2f42709e06eceb73a0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/colombo.html
@@ -0,0 +1,42 @@
+<html>
+<head>
+<title>Colombo</title>
+</head>
+<body>
+
+<h1>Colombo</h1>
+
+<p>Time to further sharpen your investigative skills. Who are these clever women?</p>
+
+<ul style="list-style-type:none;">
+<li>Phoenix	 (6) Organ born iris</li>
+<li>Indianapolis (6) Acme: hard, sly</li>
+<li>Chattanooga (7) Ebony crime yarn</li>
+<li>New York City (11) Cannot toss oar</li>
+<li>Pittsburgh (9) Any shade hill</li>
+<li>Oklahoma City (2) Trinkets in mercy</li>
+<li>Tampa (6) Infant hut okay</li>
+<li>South Bend (5) Camel canal trip</li>
+<li>Las Vegas (8) Unique logic ajar</li>
+<li>Richmond (7) Real weak din</li>
+<li>Toledo (7) Share our meal</li>
+<li>Chicago (1) No-iron Ribbons</li>
+<li>Birmingham (5) Barren angel dined</li>
+<li>Washington DC (9) Ill slime reel</li>
+<li>Providence (4) Snake drama</li>
+<li>Miami (14) Ennui jeans girl</li>
+<li>Atlanta (2) Avian ads mad</li>
+<li>Milwaukee (5) Aerobic gay jack</li>
+<li>Los Angeles (12) Tennis vice hired</li>
+<li>Detroit (2) Legacy no aim</li>
+<li>Binghamton (1) Nicer match rule</li>
+<li>Hartford (12) Sunset nears chins</li>
+<li>Salt Lake City 6) Dope weds Ohio</li>
+<li>Houston (2) Neat salad van</li>
+<li>Philadelphia (9) French fill joke</li>
+<li>Baltimore (3) Wired bean hero</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..3bbbb2d64824edbb82ddbfd0cc7abccfe84eb5c9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Colombo_colombo.html/solution.html
@@ -0,0 +1,44 @@
+<html>
+<head>
+<title>Colombo: Solution</title>
+</head>
+<body>
+<h1>Colombo: Solution</h1>
+
+<p>Solution needed. The answer is <strong>TORY</strong>.</p>
+
+<hr>
+
+<p><em>Archivist's note</em>: Partial data follows.</p>
+
+These are anagrams of names of female news anchors on FOX in the respective cities. Included are links to references indicating the station they were with in January 1999.
+<UL>
+<LI>Phoenix	 (6) Organ born iris = Robin Garrison, <A HREF="http://articles.philly.com/2003-08-31/news/25455576_1_tv-station-wpvi-tv-news">KSAZ Fox 10</A></LI>
+<LI>Indianapolis (6) Acme: hard, sly = Cheryl Adams (now Cheryl Parker), <A HREF="http://www.mcall.com/wxin-cheryl-parker-stepping-down-033110,0,5663867.story">WXIN Fox 59</A> (<A HREF="http://www.marquette.edu/comm/MUJournalism100/parker.html">see also</A>)</LI>
+<LI>Chattanooga (7) Ebony crime yarn = Connie Mayberry, WDSI Fox 61</LI>
+<LI>New York City (11) Cannot toss oar = Rosanna Scotto, <A HREF="http://en.wikipedia.org/wiki/Rosanna_Scotto">WNYW Fox 5</A></LI>
+<LI>Pittsburgh (9) Any shade hill, Sheila Hyland, <A HREF="http://www.linkedin.com/pub/sheila-hyland/11/980/1b">WPGH Fox 53</A></LI>
+<LI>Oklahoma City (2) Trinkets in mercy = Kirsten McIntyre, <A HREF="http://en.wikipedia.org/wiki/KOKH-TV">KOKH Fox 25</A></LI>
+<LI>Tampa (6) Infant hut okay = Kathy Fountain, <A HREF="http://www.big13.net/where_are_they_now.htm">WTVT Fox 13</A></LI>
+<LI>South Bend (5) Camel canal trip = Traci Capellman <A HREF="http://www.linkedin.com/pub/traci-capellman/9/b7a/a3">WSJV Fox 28</A></LI> 
+<LI>Las Vegas (8) Unique logic ajar = Angelica Urquijo, KVVU Fox 5</LI>
+<LI>Richmond (7) Real weak din = Diane Walker, <A HREF="http://www.vadv.org/secAction/Diane_Walker_Bio%5B1%5D.doc">WWBT NBC 12</A>, but they share a news team with <A HREF="http://www.foxrichmond.com/sections/news_features/news_at_ten/">WRLH Fox 10</A></LI>
+<LI>Toledo (7) Share our meal = Laura Emerson, WUPW Fox 36</LI>
+<LI>Chicago (1) No-iron Ribbons = Robin Robinson, <A HREF="http://en.wikipedia.org/wiki/Robin_Robinson">WFLD Fox 32</A></LI>
+<LI>Birmingham (5) Barren angel dined = Andrea Lindenberg, <A HREF="http://www.linkedin.com/pub/andrea-lindenberg/55/837/348">WBRC Fox 6</A></LI>
+<LI>Washington DC (9) Ill slime reel = Leslie Miller? (She was never in DC) (WTTG Fox 5?)</LI>
+<LI>Providence (4) Snake drama = Karen Adams, <A HREF="http://www.wpri.com/dpp/news/local_news/providence/wpri-anchor-karen-adams-retiring-in-december">WPRI CBS 12</A>, but they share staff with <A HREF="http://en.wikipedia.org/wiki/WNAC-TV">WNAC Fox 64</A></LI>
+<LI>Miami (14) Ennui jeans girl = Laurie Jennings, <A HREF="http://www.today.com/id/3080281#.UWNhw4ejrSg">WSVN Fox 7</A></LI>
+<LI>Atlanta (2) Avian ads mad = Amanda Davis, <A HREF="http://www.myfoxatlanta.com/story/17093956/amanda-davis">WAGA Fox 5</A></LI>
+<LI>Milwaukee (5) Aerobic gay jack = Joyce Garbaciak, <A HREF="http://www.wisn.com/tv/news-team/WISN-12-Contributing-News-Correspondent/-/9375046/10276192/-/7gdmhr/-/index.html">WITI Fox 6</A></LI>
+<LI>Los Angeles (12) Tennis vice hired = Christine Devine, <A HREF="http://en.wikipedia.org/wiki/Christine_Devine">KTTV Fox 11</A></LI>
+<LI>Detroit (2) Legacy no aim = Monica Gayle, <A HREF="http://www.myfoxdetroit.com/story/18427200/monica-gayle">WJBK Fox 2</A></LI>
+<LI>Binghamton (1) Nicer match rule (WICZ Fox 40?)</LI>
+<LI>Hartford (12) Sunset nears chins = Susan Christensen, WTIC Fox 61</LI>
+<LI>Salt Lake City 6) Dope weds Ohio = Hope Woodside, <A HREF="http://fox13now.com/author/kstuhopewoodside/">KSTU Fox 13</A></LI>
+<LI>Houston (2) Neat salad van = Anna Davlantes, KRIV Fox 26</LI>
+<LI>Philadelphia (9) French fill joke = Jill Chernekoff, <A HREF="http://www.linkedin.com/in/jillchernekoff">WTXF Fox 29</A></LI>
+<LI>Baltimore (3) Wired bean hero = Deborah Weiner, <A HREF="http://www.wbaltv.com/WBAL-TV-11-News-Anchor-I-Team-Reporter/-/9380084/10407526/-/r1puer/-/index.html">WBFF Fox 45</A></LI>
+</UL>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/madras.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/madras.html
new file mode 100644
index 0000000000000000000000000000000000000000..2b2f8eff854d9b988fc776b186b676a407f489ab
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/madras.html
@@ -0,0 +1,88 @@
+<html>
+<head>
+<title>Madras</title>
+</head>
+<body>
+
+<h1>Madras</h1>
+
+<table border="1" cellspacing="0" cellpadding="3">
+  <tr>
+    <td><b>Area Code</b></td>
+    <td><b>Bird</b></td>
+    <td><b>#Reps in House</b></td>
+    <td><b>Flower</b></td>
+    <td><b>Interstates</b></td>
+    <td><b>State Nickname</b></td>
+    <td><b>Admission to Union</b></td>
+  </tr>
+  <tr>
+    <td>New Jersey</td>
+    <td>Hawaii</td>
+    <td>Michigan</td>
+    <td>Massachusetts</td>
+    <td>Oregon</td>
+    <td>Connecticut</td>
+    <td>North Carolina</td>
+  </tr>
+  <tr>
+    <td>Maryland</td>
+    <td>Alabama</td>
+    <td>Ohio</td>
+    <td>Montana</td>
+    <td>Washington</td>
+    <td>Delaware</td>
+    <td>Vermont</td>
+  </tr>
+  <tr>
+    <td>Rhode Island</td>
+    <td>New Mexico</td>
+    <td>Illinois</td>
+    <td>Wyoming</td>
+    <td>Arizona</td>
+    <td>New Hampshire</td>
+    <td>Kentucky</td>
+  </tr>
+  <tr>
+    <td>Arkansas</td>
+    <td>Minnesota</td>
+    <td>Pennsylvania</td>
+    <td>Idaho</td>
+    <td>Georgia</td>
+    <td>West Virginia</td>
+    <td>Louisiana</td>
+  </tr>
+  <tr>
+    <td>Mississippi</td>
+    <td>Colorado</td>
+    <td>Florida</td>
+    <td>Wisconsin</td>
+    <td>South Dakota</td>
+    <td>South Carolina</td>
+    <td>Maine</td>
+  </tr>
+  <tr>
+    <td>North Dakota</td>
+    <td>Alaska</td>
+    <td>Texas</td>
+    <td>Indiana</td>
+    <td>Iowa</td>
+    <td>Nevada</td>
+    <td>Missouri</td>
+  </tr>
+  <tr>
+    <td>Utah</td>
+    <td>Oklahoma</td>
+    <td>New York</td>
+    <td>Tennessee</td>
+    <td>Virginia</td>
+    <td>Kansas</td>
+    <td>Nebraska</td>
+  </tr>
+</table>
+
+<p><i>Archivist's note</i>: This puzzle was intended to have the area code, bird, etc. for each state in the corresponding box. The above "answer grid" was accidentally distributed instead.</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..1eb7780d0eb2ce321d3eec8a66cdbb2a1e001cdf
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Madras_madras.html/solution.html
@@ -0,0 +1,13 @@
+<html>
+<head>
+<title>Madras: Solution</title>
+</head>
+<body>
+<h1>Madras: Solution</h1>
+
+<p>The only missing state is <strong>CALIFORNIA</strong>, which is the answer.
+	
+
+</BODY>
+</HTML>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/monterey.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/monterey.html
new file mode 100644
index 0000000000000000000000000000000000000000..a1160bf5979dc73f3a5eb82e6017f31bd09d0df2
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/monterey.html
@@ -0,0 +1,14 @@
+<html>
+<head>
+<title>Monterey</title>
+</head>
+<body>
+
+<h1>Monterey</h1>
+
+<p>It's time for a break from crook chasing.  Go see the Roadkill Buffet
+show at 8pm in 6-120.  Return us the answer.</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..c2d1390fd7298e6c88c3973993f08045a3e570bb
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Monterey_monterey.html/solution.html
@@ -0,0 +1,14 @@
+<html>
+<head>
+<title>Monterey: Solution</title>
+</head>
+<body>
+<h1>Monterey: Solution</h1>
+
+<p>Aside from having fun at the roadkill show, you may have noticed the host point very specifically to a person to ask for a suggestion.
+That person was none other than Tanis O'Connor, one of the hunt constructors (aka Theotherone). Her suggestion for the madrigals was <i>Advanced Placement</i>.
+The other suggestion the host got for the madrigal was from Sola Grantham, another hunt constructor (aka Tracy Mount). She gave the suggestion <i>Mystery Hunt</i>.
+The answer to this puzzle was <strong>ADVANCED PLACEMENT</strong>. All the other seemingly hunt-related improv was just that: improv. Hope you enjoyed the show!</p>
+<p>For historical interest, <a href="./1999_roadkill_buffet_schedule.pdf" target="_blank">here is the set list from the Roadkill Buffet show</a> where this transpired.</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..3a00ca3f3e4da78db9c3d2ad05ec948dc51717d5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/solution.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>Stuttgart: Solution</title>
+</head>
+<body>
+<h1>Stuttgart: Solution</h1>
+
+<p>A piece of cheese was given out with this puzzle.  The eight numbers given are UPC codes of crackers.  Unfortunately, not all of them seem to still be made, but the ones for which information could still be found are:</p>
+
+<p>
+<ol>
+<pre>
+<li>V	Dare Crackers Vivant (8 oz)</li>
+<li>-	(Nabisco)</li>
+<li>L	Keebler Crackers Club Original (16 oz)</li>
+<li>-	(Arnold Bakers)<BR></li>
+<li>-	(Wasa Extra-Crisp)</li>
+<li>V	Kavli Crispbread Thin</li>
+<li>I	Nabisco Crackers Triscuit Wafer Original (9.5 oz)</li>
+<li>L	Nabisco SnackWells Crackers Cracked Pepper (7 oz)</li>
+</pre>
+</OL>
+</p>
+
+<p>Taking the indicated letters gives VILE:EVIL.  The cheese that accompanied the puzzle was EDAM, making the answer <strong>DAME</strong>.
+
+
+</BODY>
+</HTML>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/stuttgart.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/stuttgart.html
new file mode 100644
index 0000000000000000000000000000000000000000..c11f498e76ccd38255818b65195dbbd00f680495
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Stuttgart_stuttgart.html/stuttgart.html
@@ -0,0 +1,76 @@
+<html>
+<head>
+<title>Stuttgart</title>
+</head>
+<body>
+
+<h1>Stuttgart</h1>
+
+<p>
+<TABLE WIDTH="50%">
+<TR>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>&nbsp;:&nbsp;</TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>&nbsp;::&nbsp;</TD>
+</TR>
+<TR>
+  <TD><FONT SIZE="6"><B>
+<CENTER>1</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>2</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>3</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>4</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+&nbsp;</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>5</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>6</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>7</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>8</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+&nbsp;</TD>
+</TR>
+</TABLE>
+</p>
+
+<p>
+<OL>
+  <LI>0-55653-67050-6 (first)</li>
+  <LI>0-447440-7 (second of size)</li>
+  <LI>0-30100-03012-6 (second)</li>
+  <LI>0-73410-29061-3 (second)</li>
+  <LI>0-33617-41001-6 (third of flavour)</li>
+  <LI>0-74472-75810-3 (third of brand)</li>
+  <LI>0-441190-3 (third)</li>
+  <LI>0-44000-00376-0 (eighth of sub-brand)</li>
+</OL>
+</p>
+
+
+<p><i>Archivist's note</i>: The teams were also given a cube of Edam cheese.</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..fa0fa5e5494661e66b147eaf5c6e0a794db8fff9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/solution.html
@@ -0,0 +1,34 @@
+<html>
+<head>
+<title>Taipei: Solution</title>
+</head>
+<body>
+<h1>Taipei: Solution</h1>
+
+<p>First, consider each card's numerical value--suited cards have their face value with aces as 1 and the knight as 12 (as tarot cards run "...ten, page, knight, queen, king"); major arcana are numbered on the cards (e.g. the Wheel of Fortune is 10, the Hermit is 9).  We have (the rows being column number, top row card value, bottom row card value).</p>
+<PRE>
+1	2	3	4	5	6	7	8	9	10	11	12	13
+9	1	7	3	8	4	2	7	9	8	5	1	4
+10	4	9	7	5	1	12	6	11	13	2	8	3
+</PRE>
+<p>Notice that the bottom row contains the numbers 1 through 13, though not in order.  Match each card in the bottom row to the nth card in the top row, where n is the number of the bottom-row card.  So the Wheel of Fortune, with value 10, is matched to the 10th card in the top row, the 8 of swords.  This gives:</p>
+<PRE>
+8	wheel of fortune 
+3	four of cups
+9	the hermit 
+2	the chariot 
+8	five of wands
+9	ace of swords
+1	knight of swords
+4	the lovers 
+5	force 
+4	death 
+1	two of cups
+7	justice 
+7	the empress 
+</PRE>
+<p>Taking the nth letter of the card names in the bottom row, where n is the number of the associated card in the top row, gives FUTHARK LETTER.  A futhark letter is a <strong>RUNE</strong>, which is the answer.</p>
+
+</BODY>
+</HTML>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/taipei.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/taipei.html
new file mode 100644
index 0000000000000000000000000000000000000000..57eab5116e1677ba595561c615fbbcc0eb5d2f37
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Taipei_taipei.html/taipei.html
@@ -0,0 +1,15 @@
+<html>
+<head>
+<title>Taipei</title>
+</head>
+<body>
+
+<h1>Taipei</h1>
+
+<p>The answer is a single word.</p>
+
+<img src="taipei.jpg"><br>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..c6db4c58aaf9b48ca2d38111bea6dcd7fd940bb3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/solution.html
@@ -0,0 +1,69 @@
+<html>
+<head>
+<title>Vatican City: Solution</title>
+</head>
+<body>
+<h1>Vatican City: Solution</h1>
+
+<p>Based on the hint given by the first memo, the solver is supposed to form word squares based on 5-letter synonyms to the words in bold-face in each paragraph. Here are the answers:</p>
+
+<p>
+LEANS (rests)<br>
+ELBOW (arm joint)<br>
+ABOVE (up)<br>
+NOVAE (exploding stars)<br>
+SWEET (darling)
+</p>
+<p>
+GAZES (looks)<br>
+ALERT (keenly aware)<br>
+ZEBRA (striped mammal)<br>
+ERROR (mistake)<br>
+STARE (gawk)
+</p>
+<p>
+LEAPT Uumped)<br>
+ELDER (more life-experience)<br>
+ADORE (worship)<br>
+PERSE ("per se" = in itself)<br>
+TREED (chased up a woody plant)
+</p>
+<p>
+EMIRS (chieftains)<br>
+MESON (elementary particle)<br>
+ISSUE (dispute)<br>
+ROUTE (way)<br>
+SNEER (turn up their noses)
+</p>
+<p>
+AMAHS (Chinese nurses)<br>
+MANIA (enthusiasm)<br>
+ANENT (concerning)<br>
+HINGE (turning point)<br>
+SATED (gorged)
+</p>
+
+<p>Anagram the diagonals of each of these squares to get the following words: ALLOT, GLOBE, DOLLS, ESTER, ADAGE (there are others, but only this set forms another square). These words form the following square:</p>
+<p>
+ADAGE<br>
+DOLLS<br>
+ALLOT<br>
+GLOBE<br>
+ESTER
+</p>
+
+<p>This square's diagonal may be anagrammed to form <strong>LABOR</strong> (bolar, boral, and lobar are also words, but much less common. There's also a slight hint in the introductory text where the word "work" appears.)</p>
+
+<hr>
+
+<p><i>Author's note:</i></p>
+<p>Another square I was thinking of for ALLOT was:</p>
+<p>
+LUSTS<br>
+ULTRA<br>
+STOOL<br>
+TROTS<br>
+SALSA
+</p>
+<p>with the following paragraph: "Jorge CRAVES after SUPER-hot RELISH. However, when he eats too much of it, his FECAL DISCHARGE becomes liquid: he gets DIARRHEA." I thought better of it.</p>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/vatican_city.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/vatican_city.html
new file mode 100644
index 0000000000000000000000000000000000000000..3d484a9159e25de467ec0caa6e2bd1912946b3af
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_VaticanCity_vatican_city.html/vatican_city.html
@@ -0,0 +1,53 @@
+<html>
+<head>
+<title>Vatican City</title>
+</head>
+<body>
+
+<h1>Vatican City</h1>
+
+
+<p>An informant gives you this message:</p>
+
+<p>"After work yesterday I met with an informant in St. Peter's
+Square. She said she managed to purloin a couple of memos from a VILE
+member's desk, which she gave to me. The first has the following text on
+it:</p>
+<pre>
+VILE:<BR>
+LOVE
+OVER
+VEIN
+ERNE
+</pre>
+
+<p>The second has some curious stories on it that I can't figure out the
+meaning of. Can you help?"</p>
+
+<p>Here are the stories:</p>
+
+<P>Romeo RESTS his ARM JOINT on the gatepost and looks UP.
+He sees a sight more wonderful than all the EXPLODING STARS ever
+viewed - his DARLING Juliet on the balcony.</P>
+
+<P>Pat, on a safari in Africa, LOOKS STEADILY at the STRIPED MAMMAL. The
+animal, KEENLY AWARE, takes umbrage - "Why do you GAWK?" she asks. "If you
+think I don't mind, you're making a MISTAKE."</P>
+
+<P>Jimmy's cat was not IN ITSELF particulary attractive. Still, he couldn't
+help but WORSHIP it. One time, a dog CHASED [it] UP A WOODY PLANT. As the
+cat JUMPED from branch to branch, the boy called for his MORE
+LIFE-EXPERIENCED sister to help. She drove the dog away, climbed up and
+retrieved the cat. How nice.</P>
+
+<P>The scientific group decided to build an ELEMENTARY PARTICLE detector in
+Saudi Arabia. However, The WAY to the facility was in DISPUTE, and the
+local CHIEFTAINS would TURN UP THEIR NOSES at each proposed solution. </P>
+
+<P>CONCERNING my trip to China: I had a great time until a certain TURNING POINT.
+One night, my ENTHUSIASM for eating the exotic food took over and I GORGED
+myself. I then fell ill and had to be taken care of by NURSES.</P>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..4d0d032e6637af0ffb8bae4a5174afcaf81ea69a
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/solution.html
@@ -0,0 +1,10 @@
+<html>
+<head>
+<title>Warrant 3.1: Solution</title>
+</head>
+<body>
+<h1>Warrant 3.1: Solution</h1>
+
+<p>The answer is <strong>GENERIC</strong>.</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/w3.1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/w3.1.html
new file mode 100644
index 0000000000000000000000000000000000000000..411fdb09ed6f72f21d7a86570f63df042a44a3ba
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.1_w3.1.html/w3.1.html
@@ -0,0 +1,19 @@
+<html>
+<head>
+<title>Warrant 3.1</title>
+</head>
+<body>
+
+<h1>Warrant 3.1</h1>
+
+<p>We have reason to believe that the crook is particularly fond of gingerbread. Thus, to apprehend the crook, we are requesting a sculpture of an animal, made out of gingerbread, to set as bait.</p>
+
+<p>Sources have determined that the crook has a sweet tooth, and thus you are to put on your gingerbread a lot of icing and candied ornamentation.</p>
+
+<p>The sculpture must be three-dimensional (no cookie cutter cut-outs), and again, the sculpture must be in the shape of an animal. The minimum dimensions of the object should be 6" x 6" x 6"; please add an additional 1 cubic inch for every two team members you have after 8. The object may be hollow.</p>
+
+<p>You may deliver the bait to ACME headquarters at any time. Good luck.</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..3853ee359b6576ac0501e0b6e74df35583b8ef79
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/solution.html
@@ -0,0 +1,10 @@
+<html>
+<head>
+<title>Warrant 3.2: Solution</title>
+</head>
+<body>
+<h1>Warrant 3.2: Solution</h1>
+
+Solution needed. The answer is <strong>VALERIE</strong>.</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/w3.2.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/w3.2.html
new file mode 100644
index 0000000000000000000000000000000000000000..feed0d26d6e9857174092a2358e9b48c0d2bf8d9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_3Inspector_Warrants3_w3.2_w3.2.html/w3.2.html
@@ -0,0 +1,32 @@
+<html>
+<head>
+<title>Warrant 3.2</title>
+</head>
+<body>
+
+<h1>Warrant 3.2</h1/p>
+<p>Someone was causing havoc in Bob's son Tom's marriage, and that someone was Jay Stallings.  Jay was married to Tom's ex-wife Carol, but was attracted to Tom's present wife, Natalie.   (1976)</p>
+<p>Even though Natalie was seeing Bob, she was still pining for Dan and she blamed Susan for ruining the relationship.  If Susan hadn't opened her big mouth about taking the tapes, Natalie would be Mrs. Dan Stewart. (1977)</p>
+<p>Natalie, who was carrying Jay's baby, was also short of cash due to her failing company, and she went to Jay for a loan.  Jay turned her down flat, and she vowed to make him pay! (1978) </p>
+<p>Melinda told her half-sister Barbara about her pregnancy, and the family rallied around.  Then she told Annie, who confronted Beau. (1979)</p>
+<p>Both Cricket and Margo were confused about their parents' divorce.  Margo had always sensed that her father, a traveling salesman named Bart Montgomery, had never really loved her. (1980) </p>
+<p>Tom returned home with his new girlfriend, Lyla's younger sister, Maggie Crawford, a lawyer. (1981) </p>
+<p>Bob followed Miranda to Paris where, unbeknownst to him, she was to meet with a drug lord who ordered Miranda never to see Bob again and forced her to say she was having an affair with James Stenbeck.. (1982) </p>
+<p>To escape her troubled marriage to Craig, Betsy went to Ronda, Spain, and Steve followed. (1983)</p>
+<p>Richard sank further into madness, as an apparition of Barbara told him to kill Gunnar without delay.  He tried to slash Gunnar with a razor while he slept. (1984)</p>
+<p>At Easter, longtime friends and onetime lovers Bob and Kim were finally married. (1985)</p>
+<p>As Sierra reeled from the shock that Craig had known all along that Lucinda was her mother, she confronted Lucinda, who tried to explain (1986).</p>
+<p>The new year began with the engagement of Frannie and Seth and the mystery surrounding Frannie Hughes' look alike, Sabrina. (1987)</p>
+<p>Lucinda decided she needed a new golden boy to help run her empire, and that was when Kirk Anderson came to town.  Kirk had several schemes in mind, one of which was sending Dusty off to the London office (1988).</p>
+<p>When Holden called to say he'd be making a trip back home this summer, Lily wondered if she'd made love to Caleb too soon.  The news came that Holden had married Angel Lange in Europe, and, unable to deal with her grief, Lily turned away from everyone. (1989). </p>
+<p>Emily accused Ellie of Brock's murder.  Unfortunately, the messenger who had delivered Brock's gun to Ellie and could have cleared her was found dead in her office. (1990).</p>
+<p>Barbara freaked out when she got a blackmail note about her night with Darryl in Rome.  She assumed it was from Phillipe. (1991).</p>
+<p>Frannie discovered letters that implicated Darryl in the death of his first wife, Carolyn. (1992) </p>
+<p>Edwina wanted to keep Evan from marrying Rosanna, whom Edwina hated for running away from her high society roots (1993). </p>
+<p>As Lisa frantically sought clues to Scott's whereabouts. she was consoled by the company of the dashing Eduardo. (1994) </p>
+<p>After Lily gave birth to a son, Luciano, she made plans to separate from Damian, who'd grown cold and distant. (1995) </p>
+<p>Samantha was left blind and Margo struggled with post-traumatic stress after they survived the plane crash that killed Damian. (1996) </p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/beirut.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/beirut.html
new file mode 100644
index 0000000000000000000000000000000000000000..dcef53db9a08cb932eeac38dc30dde41adeda418
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/beirut.html
@@ -0,0 +1,30 @@
+<html>
+<head>
+<title>Beirut</title>
+</head>
+<body>
+<h1>Beirut</h1>
+<ol>
+<li>Find three letters indicated by these directions.</li>
+<li>Draw them according to the following instructions:
+<ul><li>Use only capital letters.</li>
+<li>Do not draw serifs.</li>
+<li>Put the letters in reverse alphabeticl order.</li>
+<li>The rightmost point of the leftmost letter must touch the topmost point of the middle letter.  The rightmost point of the middle letter must touch the leftmost point of the rightmost letter.  Otherwise, letters must not touch each other.</li>
+<li>Assume a 0-degree "baseline" (i.e., an x-axis) that remains constant no matter what you do to the drawing.  Any diagonal must make a 70-degree angle with this baseline; e.g., "K":
+<br><img src="k.gif"></li>
+<li>Label all endpoints A through L, reading left to right and down in "rows" as you would a page of text.</li>
+</ul>
+</li>
+<li>Rotate your drawing 70 degrees to the right.  Remove the highest segment that is parallel to the baseline.</li>
+<li>Rotate your drawing 40 degrees to the right.  Remove the lowest segment that is parallel to the baseline.</li>
+<li>Rotate your drawing 180 degrees.  Of the two highest segments that originate from one endpoint, remove the left.</li>
+<li>Rotte your drawing 70 degrees to the right.</li>
+<li>Shorten segment BI by moving endpoint B a little underneath segment AC.</li>
+<li>Shorten segment EF by moving endpoint F a little to the left of segment CK.</li>
+<li>Reflect your drawing about he y-axis (i.e., draw its mirror image).</li>
+</ol>
+<p>You should now have a number.  How is it more commonly written?</p>
+<br><a href="solution.html">Solution</a>            
+</body><script type="module" src="/checkanswer.js"></script>
+</html>      
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..1085860c39afc6a31514981c0b0760ffec2d2352
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Beirut_beirut.html/solution.html
@@ -0,0 +1,18 @@
+<html>
+<head>
+<title>Beirut: Solution</title>
+</head>
+<body>
+<p>
+<h1>Beirut: Solution</h1>
+1. The three letters are A, A, and T, indicated by omission:
+<ul>
+<li>Step 2: "...in reverse alphabeticl order."</li>
+<li>Step 6: "Rotte your drawing..."</li>
+<li>Step 9: "...about he y-axis..."</li>
+</ul>
+<img src="answer.gif" width=404 height=492>
+</p>
+<p>The solution is <strong>i</strong> (the square root of -1).</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/cambridge.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/cambridge.html
new file mode 100644
index 0000000000000000000000000000000000000000..0a1d40bacad18aa3665a2fd6e7f137685be584e9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/cambridge.html
@@ -0,0 +1,32 @@
+<html>
+<head>
+<title>Cambridge</title>
+</head>
+<body>
+
+<h1>Cambridge</h1>
+<p>
+<pre>
+Gzcorng: 
+
+Kh vjg ugetgv oguucig ygtg "Oguucig vq A'cnn", cpf vjg ycttcpv
+cpuygtu, kp qtfgt, ygtg "vjku", "ku", "qwt", cpf "vguv", vjgp
+nkpg wr vjg yqtfu nkmg vjku:
+
+OGUUCIGVQaCNN   (ecr gxgtAvjkpi, tgoqxg urcegu cpf rwpevwcvkqp)
+VJKUKUQWTVGUV   (Vjg ycttcpv cpuygtu, ecrrgf, kp qtfgt)
+VGUVVJKUKQWTQ   (Dgnqy gxgtA ycttcpv cpuygt, vjg rtgxkqwu qpg,
+                 fwrnkecvgf cpf vtwpecvgf cu pgeguuctA)
+
+Cff vjgo wr: 
+bSVGEIDIQIbXV  (Vjcv'u vjg gpetArvgf vgzv)
+</pre>
+<br>
+<hr>
+NJMMQYAFNXAYFVSGNOSZLFHAJEXMZMJGLPOWSFIPZCWVAXHQPPVMROCMVXUSPSYRDFOKVAAUKDU  
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..75aeb48840f9cd210b6df8acdc8aff809d60120d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Cambridge_cambridge.html/solution.html
@@ -0,0 +1,78 @@
+<html>
+<head>
+<title>Cambridge: Solution</title>
+</head>
+<body>
+<h1>Cambridge: Solution</h1>
+
+<p>This puzzle is the final meta for this Hunt, and required the Warrant answers as input. It has two parts. The first part is a really simple cryptogram which gives the algorithm used to encode the secret message. The second part is the encoded message.</p>
+
+<p><strong>Here's the answer to the simple cryptogram:</strong></p>
+<hr>
+<pre>
+Example:
+If the secret message were "Message to y'all", and the warrant
+answers, in order, were "this", "is", "our", and "test", then
+line up the words like this:
+
+MESSAGETOYALL   (cap everything, remove spaces and punctuation)
+THISISOURTEST   (The warrant answers, capped, in order)
+TESTTHISIOURO   (Below every warrant answer, the previous one,
+                 duplicated and truncated as necessary)
+
+Add them up:
+ZQTECGBGOGZVT  (That's the encrypted text)
+</pre>
+<hr>
+
+
+
+<p>The order of the warrant answers is the order of their crooks as defined in the <a href="../../Dossiers/crook_pecking_order.txt">special bulletin</a> and a later
+<a href="../../Dossiers/intercepted_message.txt">message from Carmen to Tracy</a>. The warrant answers, in order, are:</p>
+
+<p>VALERIE STEREO JABIR MUSE ANIME SEVENTY RAINBOW INTERACT GENERIC DONUTS BOKCHOY RHYTHM</p>
+
+<p>The encoded message is:</p>
+
+<p>ABC order the city answers. Using this order on the cities, read fifth letter to find the loot.</p>
+
+<p>Indeed if you follow the instructions (except for counting spaces as letters, spelling out all acronyms except for ROTC, misordering FUNK and FREQUENCY, and spelling "millennium" incorrectly in the solution) you get:</p>
+
+<p><strong>PENULTIMATE MYSTERY HUNT COIN OF THIS MILLENIUM.</strong></p>
+
+<p>If you call in this solution to Acme, you are told you come to their headquarters to get a warrant for
+Carmen. This <a href="../../Endgame/MH1999-runaround.pdf">final puzzle</a> is a riddle trail leading to the coin.</p>
+
+
+<hr>
+
+<br>
+<h2>Composer's notes</h2>
+<ol>
+  <li>
+  	<p>The original idea for the warrant ordering was to have the hunters take the mysterious zsigs and make
+a big list (by putting zsig A after zsig B if zsig B started with the word ending zsig A).</p>
+<ul>
+ <li>contemplating the navel</li>
+<li>navel orange</li>
+<li>Orange Tour</li>
+<li>tour group</li>
+<li>group theory</li>
+<li>Theory of Everything</li>
+<li>everything else</li>
+<li>else return</li>
+</ul>
+<p>They were then to find out how the loots would fit in this list (*** need example ***). This would then
+order the loots, and hence the warrant answers. Unfortunately, the order given to me was incorrect. We
+decided to simply give the hunters the order. Which was just as well, considering how long the hunt
+went on.</p>
+</li>
+<li><p>The originally proposed encryption scheme was to have the key be the warrant answers in order
+(instead of the more complicated one presented). It was observed that it would be very easy to determine
+the correct position of a warrant answer by passing it over the encrypted text and finding where the
+deciphered plaintext made sense. The implemented scheme forces you to know the order.</p>
+</li>
+</ol>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/copenhagen.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/copenhagen.html
new file mode 100644
index 0000000000000000000000000000000000000000..6d63a64718636b011a660d925910c0673172d2b2
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/copenhagen.html
@@ -0,0 +1,34 @@
+<html>
+<head>
+<title>Copenhagen</title>
+</head>
+<body>
+
+<h1>Copenhagen</h1>
+<p>
+<ul style="list-style-type:none;">
+<li>IAP</li>
+<li>GUIDE</li>
+<li>SAYS</li>
+<li>NANOMETER</li>
+<li>FLIP-FLOP</li>
+<li>BOX</li>
+<li>TAN</li>
+<li>CANONIZED</li>
+<li>SENIOR</li>
+<li>WEEKDAY</li>
+<li>IRON</li>
+<li>BRUNSWICK</li>
+<li>DO</li>
+<li>NORWAY</li>
+<li>TFP</li>
+<li>BOEING</li>
+<li>HAWAII</li>
+<li>BAALBEK</li>
+<li>MINNESOTA</li>
+</ul>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..a48c36e3d085dff7208bed3198ac42bdaf33ed33
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Copenhagen_copenhagen.html/solution.html
@@ -0,0 +1,44 @@
+<html>
+<head>
+<title>Copenhagen: Solution</title>
+</head>
+<body>
+
+<h1>Copenhagen: Solution</h1>
+
+<p>Each word (except the first few) clues a pair of letters adjacent
+in the alphabet.  After grouping the pairs by whether they're in
+forward or reverse alphabetical order, reading down suitably chosen
+columns gives "<strong>MORE THAN JUST COIN</strong>".</p>
+
+<pre>
+    IAP
+    GUIDE
+    SAYS
+N<b>M</b>  NANOMETER
+    FLIP-FLOP  <b>J</b>K
+P<b>O</b>  BOX
+    TAN        <b>U</b>V
+    CANONIZED  <b>S</b>T
+S<b>R</b>  SENIOR
+    WEEKDAY    <b>T</b>U
+F<b>E</b>  IRON
+    BRUNSWICK  B<b>C</b>
+U<b>T</b>  DO
+    NORWAY     N<b>O</b>
+I<b>H</b>  TFP
+B<b>A</b>  BOEING
+    HAWAII     H<b>I</b>
+O<b>N</b>  BAALBEK
+    MINNESOTA  M<b>N</b>
+</pre>
+
+<p>The first few words in the puzzle hint to look in the MIT IAP
+Guide.  The relevant sentence from the description in the "Umpteenth
+Annual MIT Mystery Hunt" entry in the 1999 IAP Guide is: "And why does
+it seem like the loot is more than just the coin?"</p>
+
+<p>So the answer is <strong>LOOT</strong>.</p>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/dublin.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/dublin.html
new file mode 100644
index 0000000000000000000000000000000000000000..107ac42d60d4a56d91dc3fbcb165827554901e8b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/dublin.html
@@ -0,0 +1,21 @@
+<html>
+<head>
+<title>Dublin</title>
+</head>
+<body>
+
+<h1>Dublin</h1>
+<p>Our woman in Dublin recently turned in the following scrap of evidence:</p>
+
+<p>Enriched wheat flour (contains niacin, reduced iron, thiamine mononitrate [vitamin B1], riboflavin [vitamin B2], folic acid), sugar, high fructose corn syrup, berries/apples, corn syrup, dried apples, dextrose, natural and artificial flavor, glycerin, skim milk, salt, soy lecithin* (emulsifier), pectin, citric acid, leavening (baking soda, calcium phosphate), egg whites, caramel color, artificial color (red 40), sodium benzoate added to preserve freshness.</p>
+
+<p>
+(Your answer should be in the singular form.) 
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..307cd8fb2017d79ff7ed5017acdda9614afd27cd
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Dublin_dublin.html/solution.html
@@ -0,0 +1,12 @@
+<html>
+<head>
+<title>Dublin: Solution</title>
+</head>
+<body>
+<p>
+<h1>Dublin: Solution</h1>
+
+The ingredient list comes from a box of non-fig Newtons (<em>archivist's note: this probably means Apple Newtons&trade;, a product which has since been discontinued</em>). The answer is, therefore, <strong>NEWTON</strong>. 
+</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/helsinki.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/helsinki.html
new file mode 100644
index 0000000000000000000000000000000000000000..8b9fce15ad68bbceec87028580b5a6027dcf9316
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/helsinki.html
@@ -0,0 +1,160 @@
+<html>
+<head>
+	<title>Helsinki</title>
+</head>
+<body>
+	<h1>Helsinki</h1>
+<p>"So how do you play this game?"</p>
+<p>
+"Easy.  We just take turns putting pieces down.  You have to place
+yours so that some number of mine in a line are surrounded on 
+either end, then the surrounded ones flip and they're yours."
+</p>
+<p>
+"Who wins?"
+</p>
+<p>
+"Whoever has the most when we run out of moves."
+</p>
+<p>
+"Okay..."
+</p>
+<p>
+"You're black.  You go first."
+</p>
+<pre>
+D6
+</pre>
+<p>
+"So then I flip this one... right?"
+</p>
+<p>
+"Yup."
+</p>
+<p>
+<pre>
+........E6
+F5......G6
+G5......G4
+</pre>
+</p>
+<p>
+"Errr... ummm..."
+</p>
+<p>
+"Try thinking about what moves you leave open for me, and what
+those will leave for you.  It's not just about how many pieces you
+flip each turn. It's only mostly about that."
+</p>
+<p>
+<pre>
+F6......E7
+H5......C3
+H7......H6
+G7......G8
+</pre>
+<p>
+"This is cool.  A piece could be flipped a whole lot of times in a
+game."
+</p>
+<p>
+"You have a keen grasp of the obvious."
+</p>
+<p>
+"I wonder how many times this one over here will get flipped in a
+game..."
+</p>
+<p>
+"So keep count.  But for now, play."
+</p>
+<p>
+<pre>
+F7......H8
+D3......C5
+F3......G3
+C4......E3
+D7......E8
+C6......F8
+G2......H4
+</pre>
+</p>
+<p>
+"Hey, what are you up to there?..."
+</p>
+<p>
+"Oh, nothing.  Just a bit of strategy.  Hehehehehehehehehe"
+</p>
+<p>
+<pre>
+F2......F4
+D2......E1
+H2......B5
+F1
+</pre>
+<p>
+"Heh."
+</p>
+<p>
+<pre>
+........H3
+</pre>
+</p>
+<p>
+"Ack!"
+</p>
+<p>
+<pre>
+B2......C7
+C2......G1
+E2......H1
+B6......A6
+B7......A1
+</pre>
+<p>
+"Ha!  I see what you're doing now!"
+</p>
+<p>
+"What?"
+</p>
+<p>
+"You expect me to tell you that?!"
+</p>
+<p>
+<pre>
+B3......A3
+D8......B1
+A2......D1
+</pre>
+</p>
+<p>
+"Crap.  Pass me another beer."
+</p>
+<p>
+"We're all out of Rolling Rock."
+</p>
+<p>
+"Any Coors?"
+</p>
+<p>
+"Nope."
+</p>
+<p>
+"Then give me a Cider Jack."
+</p>
+<p>
+<pre>
+B4......A8
+C8......A7
+B8......A4
+</pre>
+</p>
+<p>
+"Errrrr... 1 2 3... 24 25... 40... 50 51... and I have 11... so if I
+did this, then you did this... no, that doesn't work... that doesn't
+work either... okay, you win.  Let's watch Seinfeld."
+</p>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..f23c905efcd340b5cf31051a85e490d8a8aefb76
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Helsinki_helsinki.html/solution.html
@@ -0,0 +1,24 @@
+<html>
+<head>
+<title>Helsinki: Solution</title>
+</head>
+<body>
+<h1>Helsinki: Solution</h1>
+<p>
+This started out as a very high-concept puzzle. The original idea was to have a color map applied to an
+Othello board, where the color of a square was determined by the number of times the piece there had
+flipped during the game.
+</p>
+<p>
+After banging my head against this for a long time and coming to the realization that constructing this
+puzzle would be an insolvably hard problem, I enlisted Sola's help and we simplified it a bit, trying for a
+black and white color map based on even or odd number of flips.
+</p>
+<p>
+We realized that this was also a problem that we did not have the energy for, so I made this a "too much
+information" problem. The dialogue is irrelevant, the first player's moves are irrelevant, and it doesn't
+even matter that they are playing Othello. Plot the second player's moves on an 8x8 grid, and it spells
+<strong>BOTH</strong>.
+</p>
+</body>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/kathmandu.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/kathmandu.html
new file mode 100644
index 0000000000000000000000000000000000000000..23bb201d11cb408ebd2a37c6d0b29c63c9a74445
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/kathmandu.html
@@ -0,0 +1,25 @@
+<html>
+<head>
+<title>Kathmandu</title>
+</head>
+<body>
+<h1>Kathmandu</h1>
+<p>
+Divide these words into pairs of related words. Then pair up pairs that 
+have a third common related word. Each word is used in one pair and each pair 
+is used once with another pair. Example: SEUSS/ZHIVAGO + KIRK/MCCOY would 
+give the answer SPOCK.
+</p>
+<p>
+<blockquote>
+NOT STAR PATH BEAM STAFF WHOLE BARREL POUND RASP POWDER ICE LUMBER ZONE
+MANILA KIDNEY COMPUTER TRIGGER FLASH GUITAR SCOPE MACHINE DOWN METER NIGHT
+WASH SKIM STRING STRAW JUMPING POTATO CAYENNE QUAVER
+</blockquote>
+</p>
+<p>Once you have found the eight answer words, extract the 4th, 5th, 9th,
+19th, 26th, and 35th letters and rearrange those to form the final answer.
+</p>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..64d920af527b26b6b13d700d775a2ff5949c56b4
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Kathmandu_kathmandu.html/solution.html
@@ -0,0 +1,111 @@
+<html>
+<head>
+<title>Kathmandu: Solution</title>
+</head>
+<body>
+<h1>Kathmandu: Solution</h1>
+
+<i>Thank you to Hugh Robinson for providing a solution.</i>
+
+<p>Pair up the words so that the two words in each pair can be preceded or followed by the same word to make a longer word or two-word phrase.  Then find a third word which also makes a word or phrase with the same preceding or following word.  This is highly ambiguous, but if you do it correctly then each third word is used twice: </p>
+
+<pre>
+         jumping \
+         lumber  -JACK
+         BLACK   &lt;
+         night   -GUARD
+         trigger /
+
+        /guitar
+ELECTRIC-meter
+        \CIRCUIT \
+         ice     -BREAKER
+         path    /
+
+        /barrel
+     GUN-powder
+        \DOG     \
+         rasp    -BERRY
+         straw   /
+
+        /pound
+ QUARTER-staff
+        &gt;FINAL
+    SEMI-quaver
+        \skim
+
+         cayenne \
+         whole   -PEPPER
+         GREEN   &lt;
+         kidney  -BEAN
+         string  /
+
+        /computer
+   MICRO-scope
+        &gt;LIGHT
+     SUN-beam
+        \down
+
+        /machine
+    TIME-zone
+        \WASTE   \
+         flash   -PAPER
+         manila  /
+
+        /potato
+   WHITE-wash
+        \WATER   \
+         not     -GATE
+         star    /
+</pre>
+
+<p>Sort the third words alphabetically, concatenate them and extract the letters with the indices stated in the puzzle:</p>
+
+<p><code>bla<strong>CK</strong>cir<strong>C</strong>uitdogfin<strong>A</strong>lgreen<strong>L</strong>ightwast<strong>E</strong>water</code></p>
+
+then randomly anagram to give the answer <strong>CACKLE</strong>.
+
+<h2>Alternate Solution from the Archives of Eric Albert, Author Unknown</h2>
+<i>(Likely solved during the hunt)</i>
+
+<pre>
+RASP/STRAW = BERRY
+LUMBER/JUMPING = JACK
+==> BERRY/JACK = BLACK <==
+
+COMPUTER/POTATO = CHIP
+SKIM/WHOLE = MILK
+==> CHIP/MILK = CHOCOLATE <==
+
+POUND/METER = UNIT OF MEASURE
+PATH/SCOPE = TELE
+==> UNIT OF MEASURE/TELE = GRAM <==
+
+STRING/KIDNEY = BEAN
+MANILLA/CAYANNE = CAPITAL CITIES
+==> BEAN/CAPITAL CITIES = LIMA <==
+
+ZONE/MACHINE = TIME
+TRIGGER/BARREL = GUN PARTS
+==> TIME/GUN PARTS = MAGAZINE <==
+
+GUITAR/ICE = PICK
+NOT/NIGHT = WORDS THAT MAKE A HOMOPHONE WHEN YOU APPEND "K"
+==> PICK/APPEND "K" = NIT <==
+
+WASH/POWDER = BATHROOM NAMES
+STAFF/QUAVER = MUSIC NOTATION
+==> BATHROOM NAMES/MUSIC NOTATION = REST <==
+
+STAR/FLASH = LIGHT
+BEAM/DOWN = SUN
+==> LIGHT/SUN = SPOT <==
+</pre>
+
+Words produced by this extraction and listed in a string alphabetically form: bla<b>CK</b>cho<b>C</b>olategram<b>L</b>imamag<b>A</b>zinenitr<b>E</b>stspot.
+This also gives an anagram of <b>CACKLE</b>, which is the answer.
+
+
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/nagoya.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/nagoya.html
new file mode 100644
index 0000000000000000000000000000000000000000..7a62bafeca952cb131af36c664df94f5f5e18285
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/nagoya.html
@@ -0,0 +1,92 @@
+<html>
+<head>
+<title>Nagoya</title>
+<style>
+ table {
+ 	border-spacing: 10px;
+ }
+</style>
+</head>
+<body>
+
+<h1>Nagoya</h1>
+<h2>From: The Mixed-Up Files of ACME Crime</h2>
+<h2>To: ACME Detectives</h2>
+<p>
+Recently I've discovered something decisively important to the future of
+ACME Crime.  Now, I know that some of you will express outrage and ask
+yourself, who let a thing like this happen?  But that's not important
+now.  What is important is that we ordered too many of those paper cards
+that we use to label the cabinets. </p><p>
+
+Now, I know that you think that this is a bum job for a detective, but
+just think a minute.  Sooner or later, the city is gonna audit us, and
+then if they find that we haven't used all of these labels, it means
+fewer requisitions next year, and, you guessed it, pretty soon ACME
+Crime completely dissolves and rampant crime ravages this quiet little
+town. </p><p>
+
+I'm counting on you to not let this happen.  Figure out how to use the
+extra cards.  Then give us a call. Your answer is vital to our finances.
+</p><p> 
+
+Oh, and rearrange those file cabinets, while you're at it.  Some of the
+drawers were overcrowded.  They don't hold many things, as you
+recall.</p><p>
+
+If you're having trouble, give us a call and we'll help you sort it
+out.</p><p> 
+
+<img src="file.jpg"></p><p>
+
+The objects from the drawers are randomly ordered below:</p><p>
+
+<table style="padding: 10px;">
+<tr>
+<td><a href=item1.html>Item1</a></td>
+<td><a href=item2.html>Item2</a></td>
+<td><a href=item3.html>Item3</a></td>
+<td><a href=item4.html>Item4</a></td>
+<td><a href=item5.html>Item5</a></td>
+<td><a href=item6.html>Item6</a></td>
+</tr>
+<tr>
+<td><a href=item7.html>Item7</a></td>
+<td><a href=item8.html>Item8</a></td>
+<td><a href=item9.html>Item9</a></td>
+<td><a href=item10.html>Item10</a></td>
+<td><a href=item11.html>Item11</a></td>
+</tr>
+<tr>
+<td><a href=item12.html>Item12</a></td>
+<td><a href=item13.html>Item13</a></td>
+<td><a href=item14.html>Item14</a></td>
+<td><a href=item15.html>Item15</a></td>
+<td><a href=item16.html>Item16</a></td>
+</tr>
+<tr>
+<td><a href=item17.html>Item17</a></td>
+<td><a href=item18.html>Item18</a></td>
+<td><a href=item19.html>Item19</a></td>
+<td><a href=item20.html>Item20</a></td>
+<td><a href=item21.html>Item21</a></td>
+</tr>
+<tr>
+<td><a href=item22.html>Item22</a></td>
+<td><a href=item23.html>Item23</a></td>
+<td><a href=item24.html>Item24</a></td>
+<td><a href=item25.html>Item25</a></td>
+<td><a href=item26.html>Item26</a></td>
+</tr>
+</table>
+
+<p><em><strong>Archivist's Note: </strong></em>The content above was found in this folder and doesn't seem to quite correspond to the way the puzzle was presented to the solvers at hunt time, as seen in the following image:</p>
+
+<img src="nagoya-huntversion.jpg" style="width: 80%; height: auto;"> 
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..97458b54859361dd69b18b15969ae164f1467ab6
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nagoya_nagoya.html/solution.html
@@ -0,0 +1,475 @@
+<html>
+<head>
+<title>Nagoya: Solution</title>
+</head>
+<body>
+<h1>Nagoya: Solution</h1>
+<p>
+Solution needed. The answer is <strong>EUROPEAN UNION</strong>.
+</p>
+
+<hr>
+
+<p><em>Archivist's Note</em>: Here is some speculation about how the puzzle might be solved:</p>
+
+<p>The bit about file drawer labels may mean that we will need to alphabetize these answers, maybe get one for each letter of the alphabet.</p>
+<OL>
+<LI>Chari river or Yobe river</LI>
+<LI>volcano</LI>
+<LI>Rosetta stone</LI>
+<LI>OS/2 or AIX</LI>
+<LI>RNA?</LI>
+<LI>is that part of a snake?</LI>
+<LI>missing</LI>
+<LI>American Greetings logo (rose)</LI>
+<LI>Mount Vernon</LI>
+<LI>Google thinks this is Stop Sellafield, a 1992 concert by U2 and other bands to support Greenpeace and fight the construction of a nuclear power plant.</LI>
+<LI>??? It is possible this is something Biblical.</LI>
+<LI>King Henry IV of France, Henry de Bourbon, not sure what they want here.</LI>
+<LI>missing</LI>
+<LI>(Joe) Zawinul</LI>
+<LI>Yobe river or Chari river</LI>
+<LI>Subliminal (They Might Be Giants song, first track on John Henry)</LI>
+<LI>photo is missing</LI>
+<LI>Xenon</LI>
+<LI>Quesnel, British Columbia, Canada</LI>
+<LI>Fat Man, the second atomic bomb used in World War II</LI>
+<LI>Absolute Zero</LI>
+<LI>Blue Nun wine</LI>
+<LI>domino</LI>
+<LI>missing</LI>
+<LI>missing</LI>
+<LI>missing</LI>
+</OL>
+<p>There are some unused images in the <A HREF="http://web.mit.edu/puzzle/www/99/4Detective/Nagoya/">folder for this puzzle</A>: item20.jpg, some sort of tunnel (which doesn't seem to go along with the actual item 20); icone.jpg, a cone for ice cream; and duplicate copies of some of the other images which spoil their intended answers (apparently the American Greetings card is a forget-me-not, the invented parody of Fahrenheit 451 is supposed to be Kelvin Zero, and item 6 is something abbreviated "aba").</p>
+
+<p>This seems to make most things start with distinct letters. Try alphabetizing.</p>
+<UL>
+<LI>"aba"</LI>
+<LI>Blue Nun wine</LI>
+<LI>Chari river</LI>
+<LI>domino</LI>
+<LI>Fat Man, the second atomic bomb used in World War II</LI>
+<LI>Forget-Me-Not (American Greetings)</LI>
+<LI>Greenpeace (Stop Sellafield)</LI>
+<LI>??? (found eating pomegranate seeds)</LI>
+<LI>photo is missing</LI>
+<LI>King Henry IV of France, Henry de Bourbon</LI>
+<LI>Kelvin Zero</LI>
+<LI>missing</LI>
+<LI>Mount Vernon</LI>
+<LI>missing</LI>
+<LI>OS/2</LI>
+<LI>RNA? (found in conjunction with a DNA strand)</LI>
+<LI>Quesnel, British Columbia, Canada</LI>
+<LI>Rosetta stone</LI>
+<LI>Subliminal</LI>
+<LI>tunnel</LI>
+<LI>missing</LI>
+<LI>volcano</LI>
+<LI>missing</LI>
+<LI>Xenon</LI>
+<LI>Yobe river</LI>
+<LI>Zawinul, Joe</LI>
+</UL>
+<p>If we want the last letters of these things, then we might be trying to complete _ N I O _ _ E _ _ _ O _ N _ 2 _ L E L L _ O _ N E L.</p>
+
+<p>Additional insight from Michael Sylvia: nearly all of the answers end with either a number (usually one or two, though Henry IV gives four) or a syllable indicative of nothingness (null, none, no, naught, etc.) The person found eating pomegranate seeds is likely Perseph(one).</p>
+<p>Possibly, since you'd wind up associating each of the twenty-six letters with a number in this way, and the majority of them seem to be zeroes, the solution might involve anagramming together that quantity of each letter? The four Hs make this seem a little less than promising, though, and if it is the right method, the missing data would make this likely impossible to solve now.</p>
+
+<p>Bryce Herdt and Joe DeVincentis give us the following answers assuming this. That is, assuming each "item" clues a word or phrase which starts with a different letter of the alphabet, and ends with either a number or a word suggesting nothing (often phonetically).</p>
+
+
+<table border="1" cellspacing="2" cellpadding="2">
+<tbody>
+<tr>
+<td valign="top">Item<br>
+</td>
+<td valign="top">Description<br>
+</td>
+<td valign="top">Answer<br>
+</td>
+<td valign="top">Letter<br>
+</td>
+<td valign="top">Ending<br>
+</td>
+<td valign="top">Number<br>
+</td>
+</tr>
+<tr>
+<td valign="top">1<br>
+</td>
+<td valign="top">found flowing into Lake Chad<br>
+</td>
+<td valign="top">Chari eau<br>
+</td>
+<td valign="top">C<br>
+</td>
+<td valign="top">oh<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">2<br>
+</td>
+<td valign="top">Mauna Loa, 13667 ft<br>
+</td>
+<td valign="top">volcano<br>
+</td>
+<td valign="top">V<br>
+</td>
+<td valign="top">no<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">3<br>
+</td>
+<td valign="top">(picture of the Rosetta Stone)<br>
+</td>
+<td valign="top">Rosetta Stone<br>
+</td>
+<td valign="top">R<br>
+</td>
+<td valign="top">one<br>
+</td>
+<td valign="top">1<br>
+</td>
+</tr>
+<tr>
+<td valign="top">4<br>
+</td>
+<td valign="top">IBM operating system<br>
+</td>
+<td valign="top">OS/2<br>
+</td>
+<td valign="top">O<br>
+</td>
+<td valign="top">2<br>
+</td>
+<td valign="top">2<br>
+</td>
+</tr>
+<tr>
+<td valign="top">5<br>
+</td>
+<td valign="top">found in conjunction with a DNA strand<br>
+</td>
+<td valign="top">?<br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+</tr>
+<tr>
+<td valign="top">6<br>
+</td>
+<td valign="top">photo, looks like part of a snake or lizard,
+duplicate copy labeled "aba"<br>
+</td>
+<td valign="top">abalone<br>
+</td>
+<td valign="top">A<br>
+</td>
+<td valign="top">one<br>
+</td>
+<td valign="top">1<br>
+</td>
+</tr>
+<tr>
+<td valign="top">7<br>
+</td>
+<td valign="top">missing<br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+</tr>
+<tr>
+<td valign="top">8<br>
+</td>
+<td valign="top">American Greetings logo<br>
+</td>
+<td valign="top">forget-me-not<br>
+</td>
+<td valign="top">F<br>
+</td>
+<td valign="top">nought<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">9<br>
+</td>
+<td valign="top">(photo of Mount Vernon)<br>
+</td>
+<td valign="top">Mount Vernon<br>
+</td>
+<td valign="top">M<br>
+</td>
+<td valign="top">none<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">10<br>
+</td>
+<td valign="top">photo of U2 at Stop Sellafield concert<br>
+</td>
+<td valign="top">U2<br>
+</td>
+<td valign="top">U<br>
+</td>
+<td valign="top">2<br>
+</td>
+<td valign="top">2<br>
+</td>
+</tr>
+<tr>
+<td valign="top">11<br>
+</td>
+<td valign="top">found eating Pomegranate seeds<br>
+</td>
+<td valign="top">Persephone<br>
+</td>
+<td valign="top">P<br>
+</td>
+<td valign="top">one<br>
+</td>
+<td valign="top">1<br>
+</td>
+</tr>
+<tr>
+<td valign="top">12<br>
+</td>
+<td valign="top">Henry of Navarre<br>
+</td>
+<td valign="top">Huguenot<br>
+</td>
+<td valign="top">H<br>
+</td>
+<td valign="top">nought<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">13<br>
+</td>
+<td valign="top">missing<br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+</tr>
+<tr>
+<td valign="top">14<br>
+</td>
+<td valign="top">plays electric piano (with photo of man)<br>
+</td>
+<td valign="top">(Joe) Zawinul<br>
+</td>
+<td valign="top">Z<br>
+</td>
+<td valign="top">null<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">15<br>
+</td>
+<td valign="top">found flowing into Lake Chad<br>
+</td>
+<td valign="top">Yobe eau<br>
+</td>
+<td valign="top">Y<br>
+</td>
+<td valign="top">oh<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">16<br>
+</td>
+<td valign="top">(wav file of They Might Be Giants song
+Subliminal)<br>
+</td>
+<td valign="top">Subliminal<br>
+</td>
+<td valign="top">S<br>
+</td>
+<td valign="top">null<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">17<br>
+</td>
+<td valign="top">missing (printout has photo of ice cream cone
+found loose in puzzle folder)<br>
+</td>
+<td valign="top">ice cream cone<br>
+</td>
+<td valign="top">I<br>
+</td>
+<td valign="top">one<br>
+</td>
+<td valign="top">1<br>
+</td>
+</tr>
+<tr>
+<td valign="top">18<br>
+</td>
+<td valign="top">periodic table cell #54<br>
+</td>
+<td valign="top">xenon<br>
+</td>
+<td valign="top">X<br>
+</td>
+<td valign="top">non<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">19<br>
+</td>
+<td valign="top">(map identifying point in British Columbia,
+Canada)<br>
+</td>
+<td valign="top">Quesnel<br>
+</td>
+<td valign="top">Q<br>
+</td>
+<td valign="top">null<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">20<br>
+</td>
+<td valign="top">Nagasaki, August 9, 1945<br>
+</td>
+<td valign="top">Ground Zero<br>
+</td>
+<td valign="top">G<br>
+</td>
+<td valign="top">zero<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">21<br>
+</td>
+<td valign="top">(photo of parody novel "the temperature at
+which nothing happens")<br>
+</td>
+<td valign="top">Kelvin zero<br>
+</td>
+<td valign="top">K<br>
+</td>
+<td valign="top">zero<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">22<br>
+</td>
+<td valign="top">(photo excerpt of Blue Nun wine logo)<br>
+</td>
+<td valign="top">Blue Nun<br>
+</td>
+<td valign="top">B<br>
+</td>
+<td valign="top">none<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">23<br>
+</td>
+<td valign="top">(photo of domino)<br>
+</td>
+<td valign="top">domino<br>
+</td>
+<td valign="top">D<br>
+</td>
+<td valign="top">no<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">24<br>
+</td>
+<td valign="top">missing<br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+</tr>
+<tr>
+<td valign="top">25<br>
+</td>
+<td valign="top">missing (printout has photo of tunnel found
+loose in puzzle folder)<br>
+</td>
+<td valign="top">tunnel<br>
+</td>
+<td valign="top">T<br>
+</td>
+<td valign="top">null<br>
+</td>
+<td valign="top">0<br>
+</td>
+</tr>
+<tr>
+<td valign="top">26<br>
+</td>
+<td valign="top">missing<br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+<td valign="top"><br>
+</td>
+</tr>
+</tbody>
+</table>
+
+<p>If the 5 unsolved ones were E 2, J 0, L 0, N 3, W 0, then these would give the quantity of each letter in the answer <strong>EUROPEAN UNION</strong>.</p>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/nairobi.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/nairobi.html
new file mode 100644
index 0000000000000000000000000000000000000000..03d2897a9519c887a7f6e92c59a5852489661b1c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/nairobi.html
@@ -0,0 +1,106 @@
+<html>
+<head>
+<title>Nairobi</title>
+
+<style>
+.square {
+ letter-spacing: 4px;
+ line-height: 14px;
+ font-size: 16px;
+}
+</style>
+
+</head>
+<body>
+
+<h1>Nairobi</h1>
+
+<img src="pie.jpg">
+
+<!--Also needs fixed-width font; the shapes below
+need to be squares instead of rectangles. Also, very important...need to take
+HTML-unhappy characters out of the text at bottom.-->
+<br>
+
+<pre class="square">
+######################################
+##############           #############
+###########                 ##########
+#########                     ########
+########                       #######
+#######                         ######
+######                           #####    ###############**#################
+#####**                           ####    ##############* *#################
+######**                           ###    #############** **################
+#######**                          ###    ############**   *################
+########**                          ##    ###########**    **###############
+##########*                         ##    ##########**      *###############
+###########**                       ##    #########**       **##############
+############**                       #    ########**         *##############
+#############**                      #    ########*          **#############
+##############**                     #    #######*            *#############
+###############**                    #    ######**            **############
+################**                   #    #####**              *############
+##################*                  #    ####**               **###########
+################***                  #    ####*                 *###########
+##############***                    #    #####                 **##########
+############***                      #    ######                 *##########
+##########***                        #    ########               *##########
+########***                          #    ###########           ############
+######***                           ##    ##################################
+####***                             ##
+##***                               ##
+##                                 ###
+###                                ###
+###                               ####
+####                             #####
+#####                           ######
+######                         #######
+#######                       ########
+########                     #########
+##########                 ###########
+#############           ##############
+######################################
+</pre>
+
+<p><br><br>
+
+ws9asw@@sz8!as9@@qwsf9#$qi!s$9ikq7f$eswqg!!cq9elsz!!5qwqap~<br>
+is~i!vq9e5q9~cswzqifw~qw~q!cs!8qif9iqw~qm!!5s!8qepi8wiw!p~k<br>
+sifw~q9@9g8wils7w@@q@9e5qalsz9aw@lqe!is9qe!~fk<p>
+
+f^u8((8u*(tr^u^(elae6*uory4lar8^u6ar22lr8*6u%e8838blt(k8u^(<br>
+e%l&amp;r8*6)lrub((tlkr^l*(lt(u*o36l36l*(lmea&amp;u38lrlf(k2l(nlmra<br>
+)uf^la3t83bo*ln4ku(nl^(e%l6ar22u6*3$i^l&amp;r26uk322lkr8*u*(l*r<br>
+2iurf(e*u3*<p>
+
+9o+{sola{sonicey:ozypeb{3o3pceb{cbyoui3e93e{3soz{sey{te{aao<br>
+niceaptche{cocy{ce9e}3:ze{owisezypey{fe{o+9aa9p3efpaa{gtoni<br>
+cez{tetpef{g3otc{9fe{e+p3:sn{wobptcey9+e{otpiah<p>
+
+&lt;ho&lt;1hney&lt;ehwrly5&lt;1hd&lt;e1uye9dhm&lt;rayt9wduh&lt;rwclylcqneihzceyg<br>
+n11xyumwq1h&lt;elymr&lt;xayny&lt;thrwwgneiyzwqy&lt;eh&lt;11q&lt;o1nwey1wh5n1o<br>
+5ycmy1whzwqy1dwywzhtxyu5nz1uhwzylc1xahut&lt;q1xho&lt;1<p>
+
+?xq.zxjsutjx.zha3.zxmj3.zaj1xqp?rtam?upxkjupap.ztcxkjsztauj<br>
+a.zxsnrhacm.13ajoxkd.cucampjaq.zxc&gt;?rrakrjjta.ztxnsuca.cays<br>
+?q4a.cx.zhjzda3?npuam?cpx.ua>suu?zna.xp.uajz<p>
+
+ramsteimnlck5mli2f5ztxmstefxtc6qmxtiisfqnlqmylz5folzzrcumai<br>
+tcqf52lqfrcmsteifolifxtc6qmneiisfecztodrcumsteifkttifrc5q2l<br>
+kmtafarwrcuflfzlym5qily3fpeqframstefolqonflmzraqjfstem5ntez<br>
+k3mlzztxmg2<p>
+
+<p><em><strong>Archivist's Note:</strong></em> The content above appears to be different from the version presented to solver at hunt time, seen in <a href="nairobi-hunttime.pdf">this PDF</a>.</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..3fa34d3516eaf5f0d8383eca3992363e46382323
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Nairobi_nairobi.html/solution.html
@@ -0,0 +1,20 @@
+<html>
+<head>
+<title>Nairobi: Solution</title>
+</head>
+<body>
+<h1>Nairobi: Solution</h1>
+<p>
+Solution needed. The answer is <strong>LOW</strong>.
+</p>
+
+<hr>
+
+<p><em>Archivist's Note</em>: Here is some speculation about how the puzzle might be solved:</p>
+
+<p>Puzzle link goes to a repaired version that fixes the HTML to more closely match the intent of this puzzle. <A HREF="http://web.mit.edu/puzzle/www/99/4Detective/Nairobi/nairobi.html">See original.</A> There also exists a file in one of the folders named <A HREF="http://web.mit.edu/puzzle/www/99/4Detective/Nairobi/test.html">test</A> which does a different repair, replacing the angle brackets of two of the encoded paragraphs with semicolon and single-quote.</p>
+
+<p>The first bit is a rebus that spells "easy as pie" (E+sea ass pine-NE) and then there is ASCII art of a pie with a slice removed. Then there are some cryptogrammish texts below that. Each one has about 160-190 characters, and each has about 24-27 different symbols (27 only in the last one). It is possible these are cryptograms with spaces and punctuation encoded, but usually an encoded space would stand out more in the distribution than what we have (maximum frequency of any symbol in one of the paragraphs is 23 out of 165, about 14%, a good match for an E but well short of the norm for a space). Also, if punctuation was encoded I would expect each message to end with a rare character, but three of them end with common characters. Maybe there are digits or symbols as part of the content of the messages, not punctuation; perhaps they decode as rebuses.</p>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/paris.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/paris.html
new file mode 100644
index 0000000000000000000000000000000000000000..6f8c56005b6716e300e7d7a0b53c7e195bf32141
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/paris.html
@@ -0,0 +1,36 @@
+<html>
+<head>
+<title>Paris</title>
+</head>
+<body>
+
+<h1>Paris</h1>
+
+<p> Note from the author: I am not much a fan of poetry but I figured
+I should overcome that, so I thought I would try to write one
+myself. However, I had a bit of a writers block with one of the
+words. I know it could be a great poem, if only you could help me fill
+in the missing word. </p>
+
+<h2>Die, Art!</h2>
+
+<p>
+<b>With</b> us <b>left</b> at <i>mit</i>, no <i>links</i> <b>must</b> be allowed to <i>muss</i> up our <b>day</b>. 
+</p><p>
+<b>Earth</b> may <i>Tag</i> a <b>stale</b> <i>Welt</i> on my <b>ass</b> (<i>fad</i> only).
+</p><p>
+<i>After</i> <b>far</b> <b>search</b> for <i>fern</i> that can <b>load</b> <i>such</i> <b>varnish</b>, every <i>Last</i> <b>fairy</b> on the <b>shelf</b>, <i>Lack</i> <i>Fee</i> of a <i>Regal</i> <b>plate</b> of <b>song</b>.
+</p><p>
+<b>Seaweed</b> fortune <i>Teller</i> <i>Lied</i>, but long <b>ago</b>, <i>Tang</i> in <i>her</i> <b>bathroom</b> did <b>loom</b> over <b>pickle-juice</b>. 
+</p><p>
+Against <i>rage</i> and <i>Bad</i> <b>council</b>, I <b>am</b> a <i>bin</i> of <b><i>Lake</i></b> <i>Rat</i> corpses.
+</p><p>
+ <b>They</b> <i>See</i> a <b>good</b> <i>man</i>, with <b>empty</b> <i>gut</i>, watch <b>eleven</b> goats <i>leer</i> eerily.
+</p><p>
+<b>Nearly</b> every <i>elf</i> is <b>large</b> and _________. 
+</p><p>
+Every <b>maggot</b> <<i>gross</i>!> (<i>fasten</i> check here) <b>has</b> <i>Made</i> a <b><i>hat</i></b> or a <b>red</b> <i>Hut</i> of <i>rot</i>.
+</p>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..e3e548c751615a8cfcf96206fb53eef5c4496d0c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Paris_paris.html/solution.html
@@ -0,0 +1,60 @@
+
+<html>
+<head><title>Paris: Solution</title>
+</head>
+<body><h1>Paris: Solution</h1>
+
+<p>For each bolded word in the poem, count forward a number of words equal to the number of letters in the word.  The word you reach is italicized, and is the German translation of the bolded word.  So the fourth word after "With" is "mit," the German word for "with."
+</p>
+<p>
+The blank line is six words after bolded "nearly" and four words before italicized "fasten."  The German for English "nearly," and the English for German "fasten," is "<strong>FAST</strong>" which is the answer.</p>
+
+<p>Here is a list of translations, though you only needed to get the idea to fill in the blank, not solve every translation.</p>
+<ul>
+<li>die Art = the form, kind, species</li>
+<li>mit = with</li>
+<li>links = left (the direction)</li>
+<li>muss =must (muessen conjugated for first person singular)</li>
+<li>der Tag = the day</li>
+<li>die Welt = the world, earth</li>
+<li>fad= stale, undistinctive</li>
+<li>der After = the anus, ass</li>
+<li>fern= far, afar, remote, aloof</li>
+<li>such= search (suchen conjugated for first person singular)</li>
+<li>die Last= the burden, load</li>
+<li>der Lack = the varnish</li>
+<li>die Fee = the fairy</li>
+<li>der Regal = the shelf</li>
+<li>der Teller = the plate</li>
+<li>das Lied = the song, melody; ballad</li>
+<li>der Tang = the seaweed</li>
+<li>her = ago, (hin unci her= back and forth)</li>
+<li>das Bad = the bath, bathroom</li>
+<li>rage= to tower, loom (ragen conjugated for first person singular)</li>
+<li>die Lake = the brine, fluid used for pickling</li>
+<li>der Rat= the council, advice</li>
+<li>bin = am (sein = to be, conjugated for first person singular)</li>
+<li>der See = the Jake, die See = the sea</li>
+<li>man = one, you, they</li>
+<li>gut= good, well, fine</li>
+<li>Jeer = blank, empty, void</li>
+<li>elf= eleven</li>
+<li>fast = almost, nearly</li>
+<li>gross = big, large</li>
+<li>fasten = to fast</li>
+<li>die Made = the maggot</li>
+<li>hat= has (haben = to have, conjugated for third person singular)</li>
+<li>der Hut = the hat</li>
+<li>rot= red</li>
+</ul>
+
+<hr>
+
+<p><em><strong>Author's Note 1:</strong></em> This was a fun puzzle to brainstorm for. I was living in Germany at the time, and noticed that many German words looked like English words. I sat down with my German roommates and by the time
+dinner was over we had a list 70 long much to our mutual surprise. Thanks to Bridget for helping me find a way to make it into a puzzle that didn't depend too much on being able to find every translation.</p>
+<p><em><strong>Author's Note 2:</strong></em> Dear solver Arthur: this puzzle was not meant to indicate that you should give up solving. Thanks for sharing your story with us at wrap up.</p>
+
+<p><small>Solution added in 2010 by the archivists of Beginner's Luck, and updated with additional information from Ken Jacobs. Thanks to Lance Nathan for providing the solution.</small></p>
+</body>
+</html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/perth.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/perth.html
new file mode 100644
index 0000000000000000000000000000000000000000..6fae15d8967e73cf42990081f7832cada9977e81
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/perth.html
@@ -0,0 +1,48 @@
+<html>
+<head>
+<title>Perth</title>
+</head>
+<body>
+
+<h1>Perth</h1>
+
+<p>
+An Acme detective says, "Acting on an anonymous tip, I broke into a back room at the Post. Laid out in type was a message that gave crucial information for decoding a secret message in an upcoming radio broadcast. I stole the type and set fire to the office in order to conceal the theft. Unfortunately, the columns of the message got scrambled. You'll need to reconstruct it quickly because the broadcast is sometime tomorrow morning." 
+</p>
+
+<p>
+Here are the type columns:
+<pre>
+D D E E E E E I I I K L N N N O O S T T T W
+E N A H L R S A I P N W E E I C N T A H L E
+I Y N O T M R P N N E K H I H A I W H I G N
+T C E R S E L L A H P R A S O A V N L D E E
+A H S R L E N W T N I T T R E E T W T O S E
+E T M R X H N O I R A W O D T R F T O H W O
+</pre>
+</p>
+
+<p>
+<em><strong>Archivist's Note: </strong></em>At hunt time, the solution to the above would lead you to the following content:
+</p>
+
+<blockquote>
+<p>
+	"I'm going to give you 2 rhyming words. You give a 3rd word that can follow each of mine to complete a compound word or familiar 2-word phrase. For example, if I said "Wish" and "Fish," you'd say BONE (as in Wishbone and fishbone)." 
+
+<ol>
+	<li>Early, Whirly</li>
+	<li>Pool, School</li>
+	<li>Band, Grand</li>
+	<li>Fair, Stair</li>
+	<li>Knot, Pot</li>
+	<li>View, Dew</li>
+	<li>Cue, Screw</li>
+	<li>Jack, Crack</li>
+	<li>[a triple] Dead, Head, Bread</li>
+</ol>
+</p>
+</blockquote>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..751c2962888e7cba608a859f7a0183c8f9d8ab4b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_Perth_perth.html/solution.html
@@ -0,0 +1,49 @@
+<html>
+<head>
+<title>Perth: Solution</title>
+</head>
+<body>
+
+<h1>Perth: Solution</h1>
+<p>
+Rearrange the columns to read:
+</p>
+<p>
+LISTEN TO WEEKEND EDITION WITH LIANE HANSEN. REPLACE KN WITH H IN ONE RHYMING PAIR AND SOLVE. REPLACE THE LAST TWO LETTERS IN THE ANSWER WITH X TO FORM ANOTHER WORD.
+</p>
+<p>
+Weekend Edition is an NPR program that airs on Saturday and Sunday mornings. The Sunday program is hosted by Liane Hansen and airs in Boston on WBUR (90.9 FM) at 8:00. One regular segment on the program features 'puzzle master' Will Shortz (the New York Times crossword puzzle editor), which always airs about 40 minutes into the show. One piece of his segment involves posing word puzzles to a
+listener who submitted a correct answer to the previous week's 'challenge puzzle'. 
+The piece went something like this (answers to clues are inline):</p>
+
+<blockquote>
+<p>
+"I'm going to give you 2 rhyming words. You give a 3rd word that can follow each of mine to complete a compound word or familiar 2-word phrase. For example, if I said "Wish" and "Fish," you'd say BONE (as in Wishbone and fishbone)."
+</p>
+<ol>
+	<li>Early, Whirly: BIRD</li>
+	<li>Pool, School: ROOM</li>
+	<li>Band, Grand: STAND</li>
+	<li>Fair, Stair: WAY</li>
+	<li>Knot, Pot: HOLE</li>
+	<li>View, Dew: POINT</li>
+	<li>Cue, Screw: BALL</li>
+	<li>Jack, Crack: POT</li>
+	<li>[a triple] Dead, Head, Bread: LINE</li>
+</ol>
+</blockquote>
+
+<p>Replacing the "kn" in "knot" with 'h' gives the pair "hot, pot" with answer "head". Replacing the last two letters of "head" with 'x' gives the final puzzle  answer of <strong>HEX</strong>.</p>
+
+<hr>
+
+<p>
+<strong><em>Author's notes:</em></strong>
+<ol>
+<li>I am acquainted (as are some others in Acme) with Will Shortz through the National Puzzlers' League (NPL). He is VERY nice.
+<li>An interesting coincidence was pointed out by an Ygology member (thanks, Squonk) - the NPL nom (see note below) for the composers of the challenge puzzle given in the broadcast is HEX.</li>
+<li>Note: Almost all NPL members have pseudonyms, referred to as "noms". In the case of HEX, it's actually a pair of people - Emily Cox and Henry Rathvon, who compose the Boston Globe Sunday crossword that appears every other week and the Atlantic Monthly puzzle. In fact we pointed hunters to a web site which is a guide by them to solving cryptic crosswords.</li>
+</ol>
+</p>
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_SanFrancisco_san_francisco.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_SanFrancisco_san_francisco.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_4Detective_SanFrancisco_san_francisco.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/beirut.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/beirut.html
new file mode 100644
index 0000000000000000000000000000000000000000..bbb8c17649b1479f95160f18a9928946fa4fe3e9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/beirut.html
@@ -0,0 +1,30 @@
+<html>
+<head>
+<title>Beirut</title>
+</head>
+<body>
+<h1>Beirut</h1>
+<ol>
+<li>Find three letters indicated by these directions.</li>
+<li>Draw them according to the following instructions:
+<ul><li>Use only capital letters.</li>
+<li>Do not draw serifs.</li>
+<li>Put the letters in reverse alphabeticl order.</li>
+<li>The rightmost point of the leftmost letter must touch the topmost point of the middle letter.  The rightmost point of the middle letter must touch the leftmost point of the rightmost letter.  Otherwise, letters must not touch each other.</li>
+<li>Assume a 0-degree "baseline" (i.e., an x-axis) that remains constant no matter what you do to the drawing.  Any diagonal must make a 70-degree angle with this baseline; e.g., "K":
+<br><img src="k.gif"></li>
+<li>Label all endpoints A through L, reading left to right and down in "rows" as you would a page of text.</li>
+</ul>
+</li>
+<li>Rotate your drawing 70 degrees to the right.  Remove the highest segment that is parallel to the baseline.</li>
+<li>Rotate your drawing 40 degrees to the right.  Remove the lowest segment that is parallel to the baseline.</li>
+<li>Rotate your drawing 180 degrees.  Of the two highest segments that originate from one endpoint, remove the left.</li>
+<li>Rotte your drawing 70 degrees to the right.</li>
+<li>Shorten segment BI by moving endpoint B a little underneath segment AC.</li>
+<li>Shorten segment EF by moving endpoint F a little to the left of segment CK.</li>
+<li>Reflect your drawing about he y-axis (i.e., draw its mirror image).</li>
+</ol>
+<p>You should now have a number.  How is it more commonly written?</p>
+<br><a href="solution.html">Solution</a>            
+</body><script type="module" src="/checkanswer.js"></script>
+</html>      
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/bogota.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/bogota.html
new file mode 100644
index 0000000000000000000000000000000000000000..7dd5d181611e7d39564ea3d7813c6fbd2782e213
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/bogota.html
@@ -0,0 +1,62 @@
+<html>
+<head>
+<title>Bogota</title>
+</head>
+<body>
+
+<h1>Bogota</h1>
+
+<p>
+there's still so much for me to do, and to know, and to be and to feel i
+can tell you i'm the law with my medals from the war so don't tell me what
+to do with my narrow point of view hit me in the morning hit me in the
+night hit me when I'm wrong hit me when I'm the man in the crowd with the
+multicolored mirrors on his hobnail boots they raise the price of oil and
+they censor our mouths with six high definition nozzles and adaptor with a
+fifteen inch food decorating bag with three piping nozzles and in the glow
+of the moon know my deliverance will come soon can't tell how long you're
+gone can't tell how long you stay feels like I'm living in a world gone mad
+look around, all around it's just the same send me a signed, tell me your
+feelings are just as real you say you don't believe a thing I say, I say
+you don't believe a thing devoid of worries no love is forlorn when i'm
+feeling blue, all i have to do is take a look at you then i'm not so blue
+hard luck girl, your peace of mind must seem a long time coming sometimes
+lovers stay too long sometimes they leave too soon there's only one thing
+left to do it's come back 'round to you
+</p>
+<p>
+I'm on a bus on a psychedelic trip reading murder books tryin' to stay hip
+the bigger the city well, the brighter the lights the bigger the dog well,
+the harder the bite these things go through your head when there's a man on
+your back and you're pushed flat on your stomach it's not a classic
+cadillac nd he saves the day and the world knows now watch his head explode
+and you know you better watch your step or you're gonna get hurt yourself
+for most of my life I've been a fool and you know what a fool can do
+roughneck man me no want none a dat beat up me body, lick off me head top
+day-glo paint on an electric chair electric dye in her lover's hair
+backstage, under age, adolescent how ya doin? fine, sugar pie, I like to do
+the wild thing in a year or maybe two, we'll be gone and someone new will
+take our place they're so good at making soldiers but they're not so good
+at making men we were young and we were pure and life was just an open door
+I don't ask a lot girl but I know one thing's for sure it's the love I
+haven't got girl and I just can't take it anymore I'll take you to the
+highest mountain to the depths of the deepest sea
+</p>
+<p>
+they look so natural together, just like two newlyweds should be is there a
+canopy in store for me my head's got a hole in it and everything's been
+ruined by the rain pack and pick the ping pong starter jewels cleaving skin
+between breasts I am standing up at the water's edge in my dream I cannot
+make a single sound as you scream power she's a dangerous seductress I
+don't care if you're another Rudolph Valentino just like you we'll wind up
+in the ocean one more sacred lover that I shot dead shadow in my heart is
+tearing me apart you can go ahead now little darling, 'cause I want you to
+have your way honey, how long was I laughing in the rain with you he
+protected his feelings in walls he imagined but castles crumble exposing
+the frightened child runnin' through the night I can make it right it's
+comin' on like thunder
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/cambridge.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/cambridge.html
new file mode 100644
index 0000000000000000000000000000000000000000..a8cfb8510a4185a7c49e2ac7c3ba41fa8d300d21
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/cambridge.html
@@ -0,0 +1,32 @@
+<html>
+<head>
+<title>Cambridge</title>
+</head>
+<body>
+
+<h1>Cambridge</h1>
+<p>
+<pre>
+Gzcorng: 
+
+Kh vjg ugetgv oguucig ygtg "Oguucig vq A'cnn", cpf vjg ycttcpv
+cpuygtu, kp qtfgt, ygtg "vjku", "ku", "qwt", cpf "vguv", vjgp
+nkpg wr vjg yqtfu nkmg vjku:
+
+OGUUCIGVQaCNN   (ecr gxgtAvjkpi, tgoqxg urcegu cpf rwpevwcvkqp)
+VJKUKUQWTVGUV   (Vjg ycttcpv cpuygtu, ecrrgf, kp qtfgt)
+VGUVVJKUKQWTQ   (Dgnqy gxgtA ycttcpv cpuygt, vjg rtgxkqwu qpg,
+                 fwrnkecvgf cpf vtwpecvgf cu pgeguuctA)
+
+Cff vjgo wr: 
+bSVGEIDIQIbXV  (Vjcv'u vjg gpetArvgf vgzv)
+</pre>
+<br>
+<hr>
+NJMMQYAFNXAYFVSGNOSZLFHAJEXMZMJGLPOWSFIPZCWVAXHQPPVMROCMVXUSPSYRDFOKVAAUKDU  
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/capetown.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/capetown.html
new file mode 100644
index 0000000000000000000000000000000000000000..43d46142a06f2bf298603014149be1874cf1b2e3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/capetown.html
@@ -0,0 +1,141 @@
+<html>
+<head>
+<title>Capetown</title>
+</head>
+<body>
+
+<h1>Capetown</h1>
+
+<center>
+<p><h2>He who finds the cheese will win!</h2></p>
+<IMG SRC="mice1.jpg"></center>
+
+<p>Three mice are set loose one at a time in a maze. They each try to
+document their time in different ways. The maze fits within a 6 by 13
+grid. Not every mouse traverses every square (you can get the unique
+answer anyhow).</p>
+
+<h2>Blinky</h2>
+
+<p>NOTE: Pictures are not shown in the order taken.</p>
+<p><IMG SRC="maze3.jpg"></p>
+<p><IMG SRC="maze2.jpg"></p>
+<p><IMG SRC="maze4.jpg"></p>
+<p><IMG SRC="maze1.jpg"></p>
+<p><IMG SRC="maze5.jpg"></p>
+
+<hr>
+<br>
+<h2>Jottie</h2>
+
+<p>
+I woke up to unfamiliar magenta walls and a blue floor lit from above
+with wide spotlights. I had a moment of panic when I realized I had my
+trusty blue pen, but no notepad beside me. I would have to rely on my
+memory. You see it was my first assignment as a new reporter for the
+Lab Rat Rag and I was in a new maze.  The first thing I saw was that I
+was at the dead end of a hallway extended out in front of me. I
+decided that a smart move would be to mark my way on the floor, so if
+I ever came that way a second time I would not go the same way
+twice. But to save ink (and time) I would only mark which way I went
+if there was a choice.
+</p>
+<p>
+I went a little ways along the hallway. Soon there was an opening on
+my left and the hallway ahead looked like it deadended a ways forward
+so I drew an arrow on the floor pointing left and turned to go through
+the opening.
+</p>
+<p>
+To my dismay I then stepped out into a hallway that was completely
+dark in both directions (it stretched out to my left and to my right).
+ wasn't sure which direction to go but the left looked shorter so I
+bent down to make an arrow, but my pen didn't show up in the darkness
+and I had to pause and think about my maze algorithms class for a
+minute. I reasoned that it would be safest if I always took the
+leftmost branch when I couldn't mark my way.
+</p>
+<p>
+When I reached the end of the hallway there was an opening on my right
+which I took (there being no other choice). But no sooner had I
+stepped out of the dark hallway, then I had another choice: Right or
+straight ahead. My first impulse was to turn right since straight
+ahead looked like more darkness and I wanted to be able to use my
+pen. But when I looked down the hallway to my right I saw no openings,
+so I sighed and continued on forward into the darkness (first marking
+the direction I followed on the ground).
+</p>
+<p>
+Once entering this new dark hall I realized immediately I would have
+to turn right. I did so and walked glumly down the long hall. At the
+end I had to turn left.
+</p>
+<p>
+The area in front of me was lit. I was so relieved I marked my way
+even though I had no choice. I had to go straight... into
+another dark hallway, this time leading off to the left.
+</p>
+<p>
+About halfway down it I came to an opening on my left. I followed my
+"choice in the dark" rule and turned into the opening.  After turning
+there was a short hallway to my left. But it seemed to be a dead end
+so I turned around and went back out into the long dark hall.
+</p>
+<p>
+I continued on to my left (the same direction I had been going prior
+to the last little "in the dark choice") and immediately saw another
+opening on my left. I took this one too, but all it had was a small
+dark cubbyhole on the right. Exasperated I went back out into the long
+hall. Only all of a sudden I realized I was almost at the end of it,
+so I continued to the end and turned right and out under another
+light.
+</p>
+<p>
+Ahead of me was yet another dark hallway! This time stretching right
+again. I was starting to sense a pattern here and I tell you I was
+getting sick of it. I went a little ways down it and soon found light
+openings on both my right and left. I choose left, just to be
+consistent, you understand. It was a short hallway stretching to the
+right. I could see that there were no other exits, but I thought I saw
+something on the floor at the end, so I went to investigate.
+</p>
+<p>
+It wasn't the cheese scoop that would have assured my career, but I
+was happy enough after I saw it, because it was this piece of paper. I
+decided I had better take the opportunity to record what had happened
+so far since I was already starting to forget.
+</p>
+<p>
+Next I will go back over it all and make a map and continue on. Well
+maybe after I take a nap...
+</p>
+
+
+<hr>
+<br>
+<h2>Milton</h2>
+
+<p>NOTE: Milton has short legs. However, an integral number of his steps
+do fit within one wall segment.</p>
+
+
+<!--important for this to be in non-proportional font-->
+<pre>
+
+  2   1   1                      2           2             1   
+3 | 6 ^ 3 ^ 15 v 2 v 17 v 8 v 14 | 6 v 2 v 5 | 15 v 8 v 14 ^ 3 
+
+
+1   2               2               2            1   1   2    
+^ 3 | 3 v 2 v 5 v 2 | 3 v 8 v 2 v 5 | 6 v 8 v 14 ^ 3 ^ 3 | 3 v 
+
+
+          2               2
+2 v 5 v 2 | 3 v 8 v 2 v 5 | 6
+</pre>
+
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/charlotteamalie.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/charlotteamalie.html
new file mode 100644
index 0000000000000000000000000000000000000000..39a77d47dd0bd66b14a29485e7670e41ab3c9ae4
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/charlotteamalie.html
@@ -0,0 +1,36 @@
+<html>
+<head>
+	<title>Charlotte Amalie</title>
+</head>
+<body>
+<h1>Charlotte Amalie</h1>
+
+
+<p>This is a performing arts puzzle. It will go about five billion times
+smoother and faster if you look over your lines before your rehersals
+begin. There are five "actors": red, yellow, green, blue and purple.
+They meet in 10 scenes. As one of the actors (see below) you will be
+performing in only 4 of the scenes. It's a play about questions, and
+you've many. But unfortunately, you don't have the whole script, just
+cues (in brackets) before your lines and your lines are all out
+of order so you don't know the ultimate question. The ultimate question
+might be one not in this email, i.e., one another team asks you.</p>
+
+<p>You must try and schedule your own meeting times with teams of other
+colors (perhaps the zephyr instance would be useful). | indicates "or".
+This puzzle would work best by distibuting an "actor's" lines out to various
+team members who memorize their cues and lines. Things in parentheses are
+actions and you must do them. Typos are irrevelant.</p>
+
+<p><em>Archivist's Note:</em> The teams were each assigned a color and emailed one
+of the following five scripts (with the introduction quoted above):</p>
+
+<a href="blue.txt">Blue</a><br>
+<a href="green.txt">Green</a><br>
+<a href="purple.txt">Purple</a><br>
+<a href="red.txt">Red</a><br>
+<a href="yellow.txt">Yellow</a><br>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/chihuahua.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/chihuahua.html
new file mode 100644
index 0000000000000000000000000000000000000000..88e0da57694b47eb294c295103b383ab314aaf7b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/chihuahua.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>Chihuahua</title>
+</head>
+<body>
+
+<h1>Chihuahua</h1>
+
+<ul style="list-style-type:none;">
+<li><a href="1.wav">1</li>
+<li><a href="2.wav">2</li>
+<li><a href="3.wav">3</li>
+<li><a href="4.wav">4</li>
+<li><a href="5.wav">5</li>
+<li><a href="6.wav">6</li>
+<li><a href="7.wav">7</li>
+<li><a href="8.wav">8</li>
+<li><a href="9.wav">9</li>
+<li><a href="10.wav">10</li>
+<li><a href="11.wav">11</li>
+<li><a href="12.wav">12</li>
+<li><a href="13.wav">13</li>
+<li><a href="14.wav">14</li>
+<li><a href="15.wav">15</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/christchurch.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/christchurch.html
new file mode 100644
index 0000000000000000000000000000000000000000..fb64a5c61377c2901efeb289ed976222631ed7b0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/christchurch.html
@@ -0,0 +1,34 @@
+<html>
+<head>
+<title>Christchurch</title>
+</head>
+<body>
+
+<h1>Christchurch</h1>
+
+<p>We have been informed that VILE is having a party. We would like you 
+to go to Twenty Chimneys at *time TK* disguised as a crook, and talk
+to all of the VILE members you meet there. Remember to take notes, but
+try to do so discreetly. If your team name is in the first half of the
+alphabet, please bring something (healthy) to eat, and napkins. If your
+team name is in the second half of the alphabet, please bring something
+(non-alcoholic) to drink, and cups.</p>
+
+<p><i>Archivist's Note</i>: When teams attended the V.l.L.E. party in 20 Chimneys, they found that certain crooks (like the ones for
+whom Acme has dossiers) subtly dropped the following bits of information:</p>
+<ul style="list-style-type:none;">
+<li>"Richard I. Mateles ratted on Joe F. Moore"</li>
+<li>"Joe F. Moore ratted on Paul P. Shepherd"</li>
+<li>"Paul P. Shepherd ratted on Donald R. Miller"</li>
+<li>"Donald R. Miller ratted on Richard I. Mateles"</li>
+<li>"Gordon K. Lister ratted on Evelyn L. Dawes"</li>
+<li>"Evelyn L. Dawes ratted on Robert Taylor Dawes (her own husband!)"</li>
+<li>"Irv and Jean Pashkowitz ratted on Clayton Simpson Robinson"</li>
+<li>"Clayton Simpson Robinson ratted on Agent 1967"</li>
+</ul>
+<p>If they were paying close attention (or if they were just in the room at all), they would also have noticed
+many references to the words "chair," "lecture," and "connection."</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/colombo.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/colombo.html
new file mode 100644
index 0000000000000000000000000000000000000000..43bd824f8deebd7542dc1a56e1bc39f54c7faea1
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/colombo.html
@@ -0,0 +1,42 @@
+<html>
+<head>
+<title>Colombo</title>
+</head>
+<body>
+
+<h1>Colombo</h1>
+
+<p>Time to further sharpen your investigative skills. Who are these clever women?</p>
+
+<ul style="list-style-type:none;">
+<li>Phoenix	 (6) Organ born iris</li>
+<li>Indianapolis (6) Acme: hard, sly</li>
+<li>Chattanooga (7) Ebony crime yarn</li>
+<li>New York City (11) Cannot toss oar</li>
+<li>Pittsburgh (9) Any shade hill</li>
+<li>Oklahoma City (2) Trinkets in mercy</li>
+<li>Tampa (6) Infant hut okay</li>
+<li>South Bend (5) Camel canal trip</li>
+<li>Las Vegas (8) Unique logic ajar</li>
+<li>Richmond (7) Real weak din</li>
+<li>Toledo (7) Share our meal</li>
+<li>Chicago (1) No-iron Ribbons</li>
+<li>Birmingham (5) Barren angel dined</li>
+<li>Washington DC (9) Ill slime reel</li>
+<li>Providence (4) Snake drama</li>
+<li>Miami (14) Ennui jeans girl</li>
+<li>Atlanta (2) Avian ads mad</li>
+<li>Milwaukee (5) Aerobic gay jack</li>
+<li>Los Angeles (12) Tennis vice hired</li>
+<li>Detroit (2) Legacy no aim</li>
+<li>Binghamton (1) Nicer match rule</li>
+<li>Hartford (12) Sunset nears chins</li>
+<li>Salt Lake City 6) Dope weds Ohio</li>
+<li>Houston (2) Neat salad van</li>
+<li>Philadelphia (9) French fill joke</li>
+<li>Baltimore (3) Wired bean hero</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/copenhagen.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/copenhagen.html
new file mode 100644
index 0000000000000000000000000000000000000000..78b3777d7513588395fb5bdcd7387dd699f9435b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/copenhagen.html
@@ -0,0 +1,34 @@
+<html>
+<head>
+<title>Copenhagen</title>
+</head>
+<body>
+
+<h1>Copenhagen</h1>
+<p>
+<ul style="list-style-type:none;">
+<li>IAP</li>
+<li>GUIDE</li>
+<li>SAYS</li>
+<li>NANOMETER</li>
+<li>FLIP-FLOP</li>
+<li>BOX</li>
+<li>TAN</li>
+<li>CANONIZED</li>
+<li>SENIOR</li>
+<li>WEEKDAY</li>
+<li>IRON</li>
+<li>BRUNSWICK</li>
+<li>DO</li>
+<li>NORWAY</li>
+<li>TFP</li>
+<li>BOEING</li>
+<li>HAWAII</li>
+<li>BAALBEK</li>
+<li>MINNESOTA</li>
+</ul>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/dublin.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/dublin.html
new file mode 100644
index 0000000000000000000000000000000000000000..b9a6538e8ce4edacd925c1ce45459713181b8996
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/dublin.html
@@ -0,0 +1,21 @@
+<html>
+<head>
+<title>Dublin</title>
+</head>
+<body>
+
+<h1>Dublin</h1>
+<p>Our woman in Dublin recently turned in the following scrap of evidence:</p>
+
+<p>Enriched wheat flour (contains niacin, reduced iron, thiamine mononitrate [vitamin B1], riboflavin [vitamin B2], folic acid), sugar, high fructose corn syrup, berries/apples, corn syrup, dried apples, dextrose, natural and artificial flavor, glycerin, skim milk, salt, soy lecithin* (emulsifier), pectin, citric acid, leavening (baking soda, calcium phosphate), egg whites, caramel color, artificial color (red 40), sodium benzoate added to preserve freshness.</p>
+
+<p>
+(Your answer should be in the singular form.) 
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/freetown.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/freetown.html
new file mode 100644
index 0000000000000000000000000000000000000000..2c68ddf862c00f1a58f26500998ef0067183611c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/freetown.html
@@ -0,0 +1,18 @@
+<html>
+<head></head>
+<body bgcolor="ffffff">
+
+<h1>Freetown</h1>
+
+<p>
+We received this strange set of objects dropped in a little bundle at
+ACME Headquarters. Try to figure out what it means. </p>
+
+<p>
+<i>Archivist's Note</i>: Print <a href="freetown.pdf">this PDF</a> on one sheet of paper, double-sided, to get a reproduction of the set of double-sided pentominoes
+needed for this puzzle.<p>
+
+<a href="solution.html">Solution</a>
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/helsinki.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/helsinki.html
new file mode 100644
index 0000000000000000000000000000000000000000..ee5f94cd2ffd90a8dd0170606b4cd688a12b1e86
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/helsinki.html
@@ -0,0 +1,160 @@
+<html>
+<head>
+	<title>Helsinki</title>
+</head>
+<body>
+	<h1>Helsinki</h1>
+<p>"So how do you play this game?"</p>
+<p>
+"Easy.  We just take turns putting pieces down.  You have to place
+yours so that some number of mine in a line are surrounded on 
+either end, then the surrounded ones flip and they're yours."
+</p>
+<p>
+"Who wins?"
+</p>
+<p>
+"Whoever has the most when we run out of moves."
+</p>
+<p>
+"Okay..."
+</p>
+<p>
+"You're black.  You go first."
+</p>
+<pre>
+D6
+</pre>
+<p>
+"So then I flip this one... right?"
+</p>
+<p>
+"Yup."
+</p>
+<p>
+<pre>
+........E6
+F5......G6
+G5......G4
+</pre>
+</p>
+<p>
+"Errr... ummm..."
+</p>
+<p>
+"Try thinking about what moves you leave open for me, and what
+those will leave for you.  It's not just about how many pieces you
+flip each turn. It's only mostly about that."
+</p>
+<p>
+<pre>
+F6......E7
+H5......C3
+H7......H6
+G7......G8
+</pre>
+<p>
+"This is cool.  A piece could be flipped a whole lot of times in a
+game."
+</p>
+<p>
+"You have a keen grasp of the obvious."
+</p>
+<p>
+"I wonder how many times this one over here will get flipped in a
+game..."
+</p>
+<p>
+"So keep count.  But for now, play."
+</p>
+<p>
+<pre>
+F7......H8
+D3......C5
+F3......G3
+C4......E3
+D7......E8
+C6......F8
+G2......H4
+</pre>
+</p>
+<p>
+"Hey, what are you up to there?..."
+</p>
+<p>
+"Oh, nothing.  Just a bit of strategy.  Hehehehehehehehehe"
+</p>
+<p>
+<pre>
+F2......F4
+D2......E1
+H2......B5
+F1
+</pre>
+<p>
+"Heh."
+</p>
+<p>
+<pre>
+........H3
+</pre>
+</p>
+<p>
+"Ack!"
+</p>
+<p>
+<pre>
+B2......C7
+C2......G1
+E2......H1
+B6......A6
+B7......A1
+</pre>
+<p>
+"Ha!  I see what you're doing now!"
+</p>
+<p>
+"What?"
+</p>
+<p>
+"You expect me to tell you that?!"
+</p>
+<p>
+<pre>
+B3......A3
+D8......B1
+A2......D1
+</pre>
+</p>
+<p>
+"Crap.  Pass me another beer."
+</p>
+<p>
+"We're all out of Rolling Rock."
+</p>
+<p>
+"Any Coors?"
+</p>
+<p>
+"Nope."
+</p>
+<p>
+"Then give me a Cider Jack."
+</p>
+<p>
+<pre>
+B4......A8
+C8......A7
+B8......A4
+</pre>
+</p>
+<p>
+"Errrrr... 1 2 3... 24 25... 40... 50 51... and I have 11... so if I
+did this, then you did this... no, that doesn't work... that doesn't
+work either... okay, you win.  Let's watch Seinfeld."
+</p>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/hints.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/hints.html
new file mode 100644
index 0000000000000000000000000000000000000000..064a17733467c1a936896db651d6e7e2020eeb8b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/hints.html
@@ -0,0 +1,76 @@
+<html>
+<head>
+<title>Gumshoe Hints</title>
+</head>
+<body>
+
+<h1>Gumshoe Hints</h1>
+<p>Agents in the field have obtained this information:</p>
+<p>Barcelona:</p>
+<ol>
+<li>There is a file called repair.html in the same directory as the original puzzle, which had errors. BE SURE YOU ARE USING THE NEW VERSION!</li>
+<li>The white parts are transparent.</li>
+<li>Are you looking at the right patterns in Building 56? Ignore the floor.</li>
+<li>Use the patterns as masks.</li>
+</ol>
+
+<p>Freetown:</p>
+<ol>
+<li>The pentominoes fit into a 6x10 rectangle.</li>
+<li>You have to solve each side separately.</li>
+<li>The answer spirals.</li>
+</ol>
+
+<p>Istanbul:</p>
+<ol>
+<li>This is not a simple substitution cipher.</li>
+<li>The plaintext is <strong>almost</strong> a well known poem.</li>
+<li>The aforementioned poem is from a classic children's book.</li>
+</ol>
+
+<p>Jakarta:</p>
+<ol>
+<li>This really is a cryptogram. [small hint]</li>
+<li>This is a substitution cipher. [medium hint]</li>
+<li>There are extra letters. [MAJOR hint]</li>
+<li>Note: the puzzle also contains a built in hint.</li>
+</ol>
+
+<p>New Orleans:</p>
+<ol>
+<li>1-25-94 should read 2-25-94.</li>
+<li>The numbers really are dates.</li>
+<li>There is something associated with each date.</li>
+<li>The things associated with the dates in each column form a group.</li>
+<li>The eBay website might be helpful.</li>
+</ol>
+
+<p>Phnom Penh:</p>
+<ol>
+<li>Do the colors remind you of anything? Both computer added colors and original crayon colors have (different) signifigance.<li>
+<li>Position on the page is relavent (think Wackie Wordies).</li>
+<li>You are looking for a pair of letters from each stop. If you can name the correct T station, but not the letters in the signs, give us a call anyway.</li>
+</ol>
+
+<p>Prague:</p>
+<ol>
+<li>Note that 'without' is in boldface.</li>
+<li>The riddle is instructions for decrypting the string.</li>
+<li>The riddle asks you to recall two things you should have learned <strong>throughout</strong> the course of the puzzle.</li>
+<li><strong>Without</strong> these things...</li>
+</ol>
+
+<p>Tbilisi:</p>
+<ol>
+<li>This puzzle contains typos. They are not relevant.</li>
+<li>The TV stations are real, but are the locations correct?</li>
+<li>The answer is one word and appears within the puzzle.</li>
+</ol>
+
+<p>Toronto:</p>
+<ol>
+<li>These were all written by the same composer.</li>
+<li>Figure out the BWV numbers.</li>
+<li>You've got an IP address.</li>
+<li>You received an email from alynn regarding "bulletin from Toronto". (Please contact ACME if you need this information again).</li>
+</ol>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/ho_chi_minh_city.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/ho_chi_minh_city.html
new file mode 100644
index 0000000000000000000000000000000000000000..e533a27dafe575f464de97c9c6ec25431fcebd96
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/ho_chi_minh_city.html
@@ -0,0 +1,17 @@
+<html>
+<head>
+<title>Ho Chi Minh City</title>
+</head>
+<body>
+
+<h1>Ho Chi Minh City</h1>
+<p>
+As an aspiring detective, it is time for you to gain skills in the art
+of maritime war.  When you are ready, call us to make an appointment for
+naval battle.  You may bring along other Gumshoes from your team for
+advisement.
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..23fcf02281a3ed285eedb7a1d763722b91c49e95
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/index.html
@@ -0,0 +1,266 @@
+<html>
+<head>
+  <title>Where in Hell is Carmen Sandiego?</title>
+  <style>
+    body, html {
+      width: 1000px;
+      font-family: "Lucida Grande", "Corbel", Arial, sans-serif;
+      margin: 20px 0px 20px 20px;
+    }
+  </style>
+</head>
+<body>
+<h1>Where in Hell is Carmen Sandiego?</h1>
+
+<a href="MH1999-Intro.pdf">Hunt Introduction (PDF)</a>
+
+<h2>Acme News Bulletins</h2>
+<ul>
+<li><a href="Dossiers/crook_pecking_order.txt">Crook pecking order</a></li>
+<li><a href="Dossiers/intercepted_message.txt">Intercepted message</a></li>
+</ul>
+
+<h2>Dossiers</h2>
+<p><em>Here you'll find the dossiers for all the crooks that you need to catch.</em></p>
+<ul>
+<li><a href="Dossiers/stuart.pdf">Stuart Dent-Boddy</a> |
+<a href="Dossiers/stuart_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/guy.pdf">Guy Gerr</a> |
+<a href="Dossiers/guy_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/chuck.pdf">Chuck L. "Evil" Lee</a> |
+<a href="Dossiers/chuck_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/tracy.pdf">Tracy Mount</a> |
+<a href="Dossiers/tracy_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/lou.pdf">Lou Neiben</a> |
+<a href="Dossiers/lou_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/pia.pdf">Pia Nissimo</a> |
+<a href="Dossiers/pia_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/roy.pdf">Roy L. Pain</a> |
+<a href="Dossiers/roy_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/carmen.pdf">Carmen Sandiego</a> |
+<a href="Dossiers/carmen_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/ling.pdf">Ling Wi Stik</a> |
+<a href="Dossiers/ling_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/ty.pdf">Ty Tanik</a> |
+<a href="Dossiers/ty_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/theone.pdf">Theone and Theotherone Thattoukit</a> |
+<a href="Dossiers/theone_solution.txt">solution</a></li>
+
+<li><a href="Dossiers/polly.pdf">Polly Titian</a> |
+<a href="Dossiers/polly_solution.txt">solution</a></li>
+</ul>
+
+<h2>Gumshoe</h2>
+<p><em>As a Gumshoe, you will undergo the training necessary to be promoted to the level Inspector.  Consider your tasks carefully.</em></p>
+<ul>
+<li><a href="1Gumshoe/Barcelona/barcelona.html">Barcelona</a> |
+<a href="1Gumshoe/Barcelona/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/Freetown/freetown.html">Freetown</a> |
+<a href="1Gumshoe/Freetown/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/HoChiMinh/ho_chi_minh_city.html">Ho Chi Minh City</a> |
+<a href="1Gumshoe/HoChiMinh/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/Istanbul/istanbul.html">Istanbul</a> |
+<a href="1Gumshoe/Istanbul/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/Jakarta/jakarta.html">Jakarta</a> | <a
+href="1Gumshoe/Jakarta/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/NewOrleans/new_orleans.html">New Orleans</a> |
+<a href="1Gumshoe/NewOrleans/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/NewYorkCity/new_york_city.html">New York City</a> |
+<a href="1Gumshoe/NewYorkCity/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/PhnomPenh/phnom_penh.html">Phnom Penh</a> |
+<a href="1Gumshoe/PhnomPenh/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/Prague/prague.html">Prague</a> |
+<a href="1Gumshoe/Prague/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/Tbilisi/tbilisi.html">Tbilisi</a> |
+<a href="1Gumshoe/Tbilisi/solution.html">solution</a></li>
+
+<li><a href="1Gumshoe/Toronto/toronto.html">Toronto</a> |
+<a href="1Gumshoe/Toronto/solution.html">solution</a> (partial, with answer)</li>
+
+<li>Warrants: 
+	<ul>
+	<li><a href="1Gumshoe/Warrants1/w1.1/w1.1.html">1.1</a> (Lou Nieben) |
+  <a href="1Gumshoe/Warrants1/w1.1/solution.html">solution</a></li>
+
+  <li><a href="1Gumshoe/Warrants1/w1.2/w1.2.html">1.2</a> (Guy Gerr) |
+  <a href="1Gumshoe/Warrants1/w1.2/solution.html">solution</a></li>
+
+  <li><a href="1Gumshoe/Warrants1/w1.3/w1.3.html">1.3</a> (Stuart Dent-Boddy) |
+  <a href="1Gumshoe/Warrants1/w1.3/solution.html">solution</a></li>
+  </ul>
+<li><a href="1Gumshoe/hints.html">Hints</a>
+</li>
+</ul>
+
+<h2>Investigator</h2>
+<p><em>As an Investigator, you will be responsible for catching two more crooks. Here are some leads to help you on your way.</em></p>
+<ul>
+<li><a href="2Investigator/CharlotteAmalie/charlotteamalie.html">Charlotte Amalie</a> |
+<a href="2Investigator/CharlotteAmalie/solution.html">solution</a></li>
+
+<li><a href="2Investigator/Chihuahua/chihuahua.html">Chihuahua</a> |
+<a href="2Investigator/Chihuahua/solution.html">solution</a> (partial, with answer)</li>
+
+<li><a href="2Investigator/Christchurch/christchurch.html">Christchurch</a> |
+<a href="2Investigator/Christchurch/solution.html">solution</a></li>
+
+<li><a href="2Investigator/Luxembourg/luxembourg.html">Luxembourg</a> |
+<a href="2Investigator/Luxembourg/solution.html">solution</a></li>
+
+<li><a href="2Investigator/Manila/manila.html">Manila</a> |
+<a href="2Investigator/Manila/solution.html">solution</a></li>
+
+<li><a href="2Investigator/Montevideo/montevideo.html">Montevideo</a> |
+<a href="2Investigator/Montevideo/solution.html">solution</a></li>
+
+<li><a href="2Investigator/Sao_Paulo/sao_paulo.html">Sao Paulo</a> |
+<a href="2Investigator/Sao_Paulo/solution.html">solution</a></li>
+
+<li><a href="2Investigator/Seoul/seoul.html">Seoul</a> |
+<a href="2Investigator/Seoul/solution.html">solution</a></li>
+
+<li>Warrants: 
+  <ul>
+  <li><a href="2Investigator/Warrants2/w2.1/w2.1.html">2.1</a> (Theone and Theotherone Thattoukit) |
+  <a href="2Investigator/Warrants2/w2.1/solution.html">solution</a></li>
+
+  <li><a href="2Investigator/Warrants2/w2.2/w2.2.html">2.2</a> (Tracy Mount) |
+  <a href="2Investigator/Warrants2/w2.2/solution.html">solution</a></li>
+  </ul>
+</li>
+</ul>
+
+<h2>Inspector</h2>
+<p><em>As an Inspector, you will be responsible for catching three crooks. Go get em'!</em></p>
+<ul>
+<li><a href="3Inspector/Athens/athens.html">Athens</a> |
+<a href="3Inspector/Athens/solution.html">solution</a> (answer only)</li>
+
+<li><a href="3Inspector/Beijing/beijing.html">Beijing</a> |
+<a href="3Inspector/Beijing/solution.html">solution</a></li>
+
+<li><a href="3Inspector/Bogota/bogota.html">Bogota</a> |
+<a href="3Inspector/Bogota/solution.html">solution</a></li>
+
+<li><a href="3Inspector/Capetown/capetown.html">Capetown</a> |
+<a href="3Inspector/Capetown/solution.html">solution</a></li>
+
+<li><a href="3Inspector/Colombo/colombo.html">Colombo</a> |
+<a href="3Inspector/Colombo/solution.html">solution</a> (partial, with answer)</li>
+
+<li><a href="3Inspector/Madras/madras.html">Madras</a> |
+<a href="3Inspector/Madras/solution.html">solution</a></li>
+
+<li><a href="3Inspector/Monterey/monterey.html">Monterey</a> |
+<a href="3Inspector/Monterey/solution.html">solution</a></li>
+
+<li><a href="3Inspector/Stuttgart/stuttgart.html">Stuttgart</a> |
+<a href="3Inspector/Stuttgart/solution.html">solution</a></li>
+
+<li><a href="3Inspector/Taipei/taipei.html">Taipei</a> |
+<a href="3Inspector/Taipei/solution.html">solution</a></li>
+
+<li><a href="3Inspector/VaticanCity/vatican_city.html">Vatican City</a> |
+<a href="3Inspector/VaticanCity/solution.html">solution</a></li>
+
+<li>Warrants: 
+  <ul>
+  <li><a href="3Inspector/Warrants3/w3.1/w3.1.html">3.1</a> (Ty Tanic) |
+  <a href="3Inspector/Warrants3/w3.1/solution.html">solution</a></li>
+
+  <li><a href="3Inspector/Warrants3/w3.2/w3.2.html">3.2</a> (Roy L. Paine) |
+  <a href="3Inspector/Warrants3/w3.2/solution.html">solution</a> (answer only)</li>
+
+  <li>3.3 (???) |
+  <a href="3Inspector/Warrants3/w3.3/solution.html">solution</a></li>
+  </ul>
+</li>
+</ul>
+
+<h2>Detective</h2>
+<p><em>Only four more crooks left to catch... then on to Carmen!</em></p>
+<ul>
+<li><a href="4Detective/Beirut/beirut.html">Beirut</a> |
+<a href="4Detective/Beirut/solution.html">solution</a></li>
+
+<li><a href="4Detective/Cambridge/cambridge.html">Cambridge</a> |
+<a href="4Detective/Cambridge/solution.html">solution</a></li>
+
+<li><a href="4Detective/Copenhagen/copenhagen.html">Copenhagen</a> |
+<a href="4Detective/Copenhagen/solution.html">solution</a></li>
+
+<li><a href="4Detective/Dublin/dublin.html">Dublin</a> |
+<a href="4Detective/Dublin/solution.html">solution</a></li>
+
+<li><a href="4Detective/Helsinki/helsinki.html">Helsinki</a> |
+<a href="4Detective/Helsinki/solution.html">solution</a></li>
+
+<li><a href="4Detective/Kathmandu/kathmandu.html">Kathmandu</a> |
+<a href="4Detective/Kathmandu/solution.html">solution</a> (partial, with answer)</li>
+
+<li><a href="4Detective/Nagoya/nagoya.html">Nagoya</a> (incomplete) |
+<a href="4Detective/Nagoya/solution.html">solution</a> (partial, with answer)</li>
+
+<li><a href="4Detective/Nairobi/nairobi.html">Nairobi</a> (incomplete) |
+<a href="4Detective/Nairobi/solution.html">solution</a> (partial, with answer)</li>
+
+<li><a href="4Detective/Paris/paris.html">Paris</a> |
+<a href="4Detective/Paris/solution.html">solution</a></li>
+
+<li><a href="4Detective/Perth/perth.html">Perth</a> |
+<a href="4Detective/Perth/solution.html">solution</a></li>
+
+<li><a href="4Detective/SanFrancisco/san_francisco.html">San Francisco</a> (incomplete) |
+<a href="4Detective/SanFrancisco/solution.html">solution</a> (answer only)</li>
+
+<li><a href="4Detective/Santiago/santiago.html">Santiago</a> |
+<a href="4Detective/Santiago/solution.html">solution</a></li>
+
+<li><a href="4Detective/Seattle/seattle.html">Seattle</a> |
+<a href="4Detective/Seattle/solution.html">solution</a></li>
+
+<li>Warrants: 
+  <ul>
+  <li><a href="4Detective/Warrants4/w4.1/w4.1.html">4.1</a> (Pia Nissimo) |
+  <a href="4Detective/Warrants4/w4.1/solution.html">solution</a></li>
+
+  <li><a href="4Detective/Warrants4/w4.2/w4.2.html">4.2</a> (Polly Titian) |
+  <a href="4Detective/Warrants4/w4.2/solution.html">solution</a></li>
+
+  <li><a href="4Detective/Warrants4/w4.3/w4.3.html">4.3</a> (Chuck L. "Evil" Lee) |
+  <a href="4Detective/Warrants4/w4.3/solution.html">solution</a></li>
+
+  <li><a href="4Detective/Warrants4/w4.4/w4.4.html">4.4</a> (Ling Wi Stik) |
+  <a href="4Detective/Warrants4/w4.4/solution.html">solution</a></li>
+  </ul>
+</li>
+</ul>
+
+<h2>Endgame</h2>
+<ul>
+<li><a href="Endgame/MH1999-runaround.pdf">Final Runaround (PDF)</a> | solution needed</li>
+</ul>
+
+<hr>
+<p>A number of missing puzzles and solutions were provided by Ken Jacobs, Joseph DeVincentis, and Mike Sylvia in 2013. In 2010, a number of solutions were provided by Lance Nathan, Foggy Brume, beinsane from Manic Sages, and the Beginner's Luck team. In 2015, Hugh Robinson contributed additional solutions. If you have solved one of the puzzles with a missing solution or have more information about puzzles with missing data, please contact us at <a href="mailto:puzzles@mit.edu">puzzles@mit.edu</a>.</p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/istanbul.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/istanbul.html
new file mode 100644
index 0000000000000000000000000000000000000000..cea60148a3278af7d74b085e0a4fac1975eecfeb
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/istanbul.html
@@ -0,0 +1,26 @@
+<html>
+<head>
+<title>Istanbul</title>
+</head>
+<body>
+
+<h1>Istanbul</h1>
+<p>
+XAEW IYPSSPN DQG WKH YROZNE YTAJX GLG KCVI DQG MOSHRK KP WKH
+<BR><BR>AEFI DOO RNRXD AIVI WKH KXAXPXENB DQG WKH QSQI WFYMX WCBOZIJM
+<BR><BR>HKCGXK WKH TKLLOBGYMU OA VRQ WKH NEAW XLEX FMXI WKH HQFBX
+<BR><BR>XLEX HFYHM HKCGXK WKH PAHPAH FMVH DQG WLYR WKH NZCUQWCA
+<BR><BR>NMZPQDEZMFOT JG XSSO KLV BUXVGR XBTWI KP LERH PSRK XMQI WKH
+<BR><BR>THUEVTL IRH JG YUAMNZ UQ XKYZKJ JG DA WKH ZASZAS XVII DQG
+<BR><BR>XYTTI GCNORK KP AOVBNOA DQG CU KP ALLOYN AOVBNOA JG XYTTI WKH
+<BR><BR>TKLLOBGYMU AMXL ICIW QH KQFRJ GEQI FQROOURWP AOYVBNO WKH
+<BR><BR>ZGTMRK ASSH DQG IBYISLK CU KV GEQI RQH WZR RQH WZR DQG
+<BR><BR>AOYVBNO DQG AOYVBNO WKH BUXVGR GQFIJ AIRX ZUPJRLY XSFHP JG
+<BR><BR>PIJX KV HIEH DQG AMXL LWV LIEH JG AIRX QKVEWZRSXQ FEGO DQG
+<BR><BR>LEWX XLSY XQFNS WKH TKLLOBGYMU GSQI VQ OA EVQW OA ILHTPZO ERB
+<BR><BR>P NZIJRWCA GDB JHSSVVO IGRRGE JG KPWZBTML KP KLV MRB
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/jakarta.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/jakarta.html
new file mode 100644
index 0000000000000000000000000000000000000000..deb046d4c2ffa25e765faa749a86fb46a07835a1
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/jakarta.html
@@ -0,0 +1,18 @@
+<html>
+<head>
+<title>Jakarta</title>
+</head>
+<body>
+
+<h1>Jakarta</h1>
+<p>
+<pre>
+GIH VHA ICM TIGL GIE VHT GRMGM EYG GRHE OUHYGEITI<BR><BR>
+NRHGRHCT GEYC TIVZHCH ETF GRHI LETDC GID YUJJHCK<BR><BR>
+GRHC YZETKYM MTDD MCCINYU IJM IUGCMKHIUYG JICGUTHH<BR><BR>
+</pre>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/kathmandu.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/kathmandu.html
new file mode 100644
index 0000000000000000000000000000000000000000..a084066d0b085e045664516eb8fee80515336a05
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/kathmandu.html
@@ -0,0 +1,25 @@
+<html>
+<head>
+<title>Kathmandu</title>
+</head>
+<body>
+<h1>Kathmandu</h1>
+<p>
+Divide these words into pairs of related words. Then pair up pairs that 
+have a third common related word. Each word is used in one pair and each pair 
+is used once with another pair. Example: SEUSS/ZHIVAGO + KIRK/MCCOY would 
+give the answer SPOCK.
+</p>
+<p>
+<blockquote>
+NOT STAR PATH BEAM STAFF WHOLE BARREL POUND RASP POWDER ICE LUMBER ZONE
+MANILA KIDNEY COMPUTER TRIGGER FLASH GUITAR SCOPE MACHINE DOWN METER NIGHT
+WASH SKIM STRING STRAW JUMPING POTATO CAYENNE QUAVER
+</blockquote>
+</p>
+<p>Once you have found the eight answer words, extract the 4th, 5th, 9th,
+19th, 26th, and 35th letters and rearrange those to form the final answer.
+</p>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/luxembourg.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/luxembourg.html
new file mode 100644
index 0000000000000000000000000000000000000000..1292650b067a36b0b882034bf4130c0aaf72f323
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/luxembourg.html
@@ -0,0 +1,114 @@
+<html>
+<head>
+<title>Luxembourg</title>
+</head>
+<body>
+
+<h1>Luxembourg</h1>
+
+<p>Black to Mate in 2</p>
+
+<table border="1" cellspacing="0" cellpadding="0">
+  <tr>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e<br>
+      <img border="0" src="bking.gif" width="70" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">c</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">f</td>
+    <td width="70" valign="top" align="left" height="70">w</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">d</td>
+    <td width="70" valign="top" align="left" height="70">g<br>
+      <img border="0" src="brook.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">q</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">w<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">h<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">s</td>
+    <td width="70" valign="top" align="left" height="70">l</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">k<br>
+      <img border="0" src="wqueen.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">b</td>
+    <td width="70" valign="top" align="left" height="70">c<br>
+      <img border="0" src="bbishop.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">e</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">d</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">m<br>
+      <img border="0" src="bknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">e<br>
+      <img border="0" src="bpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">o</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">t</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">f</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">t</td>
+    <td width="70" valign="top" align="left" height="70">w</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">p<br>
+      <img border="0" src="bbishop.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">j</td>
+    <td width="70" valign="top" align="left" height="70">n<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">u</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">h</td>
+    <td width="70" valign="top" align="left" height="70">r</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">d</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">a</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">a</td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">c</td>
+    <td width="70" valign="top" align="left" height="70">i</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">w</td>
+    <td width="70" valign="top" align="left" height="70">o</td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70">x<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e<br>
+      <img border="0" src="wpawn.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">n</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">i<br>
+      <img border="0" src="wknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70">d<br>
+      <img border="0" src="bknight.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">f</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">o<br>
+      <img border="0" src="wknight.gif" width="65" height="50"></td>
+  </tr>
+  <tr>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">r</td>
+    <td width="70" valign="top" align="left" height="70">s</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">a</td>
+    <td width="70" valign="top" align="left" height="70">c<br>
+      <img border="0" src="bqueen.gif" width="65" height="50"></td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">e</td>
+    <td width="70" valign="top" align="left" height="70">t</td>
+    <td width="70" valign="top" align="left" height="70" bgcolor="#D0D0D0">i</td>
+    <td width="70" valign="top" align="left" height="70">j<br>
+      <img border="0" src="wrook.gif" width="65" height="50"></td>
+  </tr>
+</table>
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/madras.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/madras.html
new file mode 100644
index 0000000000000000000000000000000000000000..163782af71f5d66d9e7a7006a62348607705d9db
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/madras.html
@@ -0,0 +1,88 @@
+<html>
+<head>
+<title>Madras</title>
+</head>
+<body>
+
+<h1>Madras</h1>
+
+<table border="1" cellspacing="0" cellpadding="3">
+  <tr>
+    <td><b>Area Code</b></td>
+    <td><b>Bird</b></td>
+    <td><b>#Reps in House</b></td>
+    <td><b>Flower</b></td>
+    <td><b>Interstates</b></td>
+    <td><b>State Nickname</b></td>
+    <td><b>Admission to Union</b></td>
+  </tr>
+  <tr>
+    <td>New Jersey</td>
+    <td>Hawaii</td>
+    <td>Michigan</td>
+    <td>Massachusetts</td>
+    <td>Oregon</td>
+    <td>Connecticut</td>
+    <td>North Carolina</td>
+  </tr>
+  <tr>
+    <td>Maryland</td>
+    <td>Alabama</td>
+    <td>Ohio</td>
+    <td>Montana</td>
+    <td>Washington</td>
+    <td>Delaware</td>
+    <td>Vermont</td>
+  </tr>
+  <tr>
+    <td>Rhode Island</td>
+    <td>New Mexico</td>
+    <td>Illinois</td>
+    <td>Wyoming</td>
+    <td>Arizona</td>
+    <td>New Hampshire</td>
+    <td>Kentucky</td>
+  </tr>
+  <tr>
+    <td>Arkansas</td>
+    <td>Minnesota</td>
+    <td>Pennsylvania</td>
+    <td>Idaho</td>
+    <td>Georgia</td>
+    <td>West Virginia</td>
+    <td>Louisiana</td>
+  </tr>
+  <tr>
+    <td>Mississippi</td>
+    <td>Colorado</td>
+    <td>Florida</td>
+    <td>Wisconsin</td>
+    <td>South Dakota</td>
+    <td>South Carolina</td>
+    <td>Maine</td>
+  </tr>
+  <tr>
+    <td>North Dakota</td>
+    <td>Alaska</td>
+    <td>Texas</td>
+    <td>Indiana</td>
+    <td>Iowa</td>
+    <td>Nevada</td>
+    <td>Missouri</td>
+  </tr>
+  <tr>
+    <td>Utah</td>
+    <td>Oklahoma</td>
+    <td>New York</td>
+    <td>Tennessee</td>
+    <td>Virginia</td>
+    <td>Kansas</td>
+    <td>Nebraska</td>
+  </tr>
+</table>
+
+<p><i>Archivist's note</i>: This puzzle was intended to have the area code, bird, etc. for each state in the corresponding box. The above "answer grid" was accidentally distributed instead.</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/manila.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/manila.html
new file mode 100644
index 0000000000000000000000000000000000000000..ae7ef92563346becea1130308c4cf69365971bdb
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/manila.html
@@ -0,0 +1,87 @@
+<html>
+<head>
+<title>Manila</title>
+</head>
+<body>
+
+<h1>Manila</h1>
+
+
+<table border="0" cellspacing="4" cellpadding="3">
+  <tr>
+    <td><a href="321741.mid">A</a></td>
+    <td><a href="412357.mid">A</a></td>
+    <td><a href="831311.mid">A</a></td>
+    <td><a href="761902.mid">A</a></td>
+  </tr>
+  <tr>
+    <td><a href="540002.mid">E</a></td>
+    <td><a href="901233.mid">E</a></td>
+    <td><a href="133342.mid">E</a></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="402233.mid">G</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="031771.mid">H</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="541230.mid">L</a></td>
+    <td><a href="876542.mid">L</a></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="345890.mid">M</a></td>
+    <td><a href="787822.mid">M</a></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="005490.mid">O</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="629019.mid">P</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="690842.mid">R</a></td>
+    <td><a href="148147.mid">R</a></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="514425.mid">S</a></td>
+    <td><a href="913785.mid">S</a></td>
+    <td><a href="408758.mid">S</a></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="425498.mid">T</a></td>
+    <td></td>
+    <td></td>
+    <td></td>
+  </tr>
+  <tr>
+    <td><a href="383698.mid">Y</a></td>
+    <td><a href="494737.mid">Y</a></td>
+    <td><a href="098236.mid">Y</a></td>
+    <td></td>
+  </tr>
+</table>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/monterey.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/monterey.html
new file mode 100644
index 0000000000000000000000000000000000000000..692380f86493e7297c93cc11430a4d3e6a8ee9bb
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/monterey.html
@@ -0,0 +1,14 @@
+<html>
+<head>
+<title>Monterey</title>
+</head>
+<body>
+
+<h1>Monterey</h1>
+
+<p>It's time for a break from crook chasing.  Go see the Roadkill Buffet
+show at 8pm in 6-120.  Return us the answer.</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/montevideo.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/montevideo.html
new file mode 100644
index 0000000000000000000000000000000000000000..f0cafaba64032dd8cd01fdef52437a2fcf2e9542
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/montevideo.html
@@ -0,0 +1,23 @@
+<html>
+<head>
+<title>Montevideo</title>
+</head>
+<body>
+
+<h1>Montevideo</h1>
+
+<p>Prozac = 4112</p>
+
+<ul style="list-style-type:none;">
+<li>808</li>
+<li>1345</li>
+<li>1345</li>
+<li>5405</li>
+<li>5604</li>
+<li>8348</li>
+<li>8439</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/nagoya.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/nagoya.html
new file mode 100644
index 0000000000000000000000000000000000000000..d0ec91697c1f69686892685aea3ed4bb117d9071
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/nagoya.html
@@ -0,0 +1,92 @@
+<html>
+<head>
+<title>Nagoya</title>
+<style>
+ table {
+ 	border-spacing: 10px;
+ }
+</style>
+</head>
+<body>
+
+<h1>Nagoya</h1>
+<h2>From: The Mixed-Up Files of ACME Crime</h2>
+<h2>To: ACME Detectives</h2>
+<p>
+Recently I've discovered something decisively important to the future of
+ACME Crime.  Now, I know that some of you will express outrage and ask
+yourself, who let a thing like this happen?  But that's not important
+now.  What is important is that we ordered too many of those paper cards
+that we use to label the cabinets. </p><p>
+
+Now, I know that you think that this is a bum job for a detective, but
+just think a minute.  Sooner or later, the city is gonna audit us, and
+then if they find that we haven't used all of these labels, it means
+fewer requisitions next year, and, you guessed it, pretty soon ACME
+Crime completely dissolves and rampant crime ravages this quiet little
+town. </p><p>
+
+I'm counting on you to not let this happen.  Figure out how to use the
+extra cards.  Then give us a call. Your answer is vital to our finances.
+</p><p> 
+
+Oh, and rearrange those file cabinets, while you're at it.  Some of the
+drawers were overcrowded.  They don't hold many things, as you
+recall.</p><p>
+
+If you're having trouble, give us a call and we'll help you sort it
+out.</p><p> 
+
+<img src="file.jpg"></p><p>
+
+The objects from the drawers are randomly ordered below:</p><p>
+
+<table style="padding: 10px;">
+<tr>
+<td><a href=item1.html>Item1</a></td>
+<td><a href=item2.html>Item2</a></td>
+<td><a href=item3.html>Item3</a></td>
+<td><a href=item4.html>Item4</a></td>
+<td><a href=item5.html>Item5</a></td>
+<td><a href=item6.html>Item6</a></td>
+</tr>
+<tr>
+<td><a href=item7.html>Item7</a></td>
+<td><a href=item8.html>Item8</a></td>
+<td><a href=item9.html>Item9</a></td>
+<td><a href=item10.html>Item10</a></td>
+<td><a href=item11.html>Item11</a></td>
+</tr>
+<tr>
+<td><a href=item12.html>Item12</a></td>
+<td><a href=item13.html>Item13</a></td>
+<td><a href=item14.html>Item14</a></td>
+<td><a href=item15.html>Item15</a></td>
+<td><a href=item16.html>Item16</a></td>
+</tr>
+<tr>
+<td><a href=item17.html>Item17</a></td>
+<td><a href=item18.html>Item18</a></td>
+<td><a href=item19.html>Item19</a></td>
+<td><a href=item20.html>Item20</a></td>
+<td><a href=item21.html>Item21</a></td>
+</tr>
+<tr>
+<td><a href=item22.html>Item22</a></td>
+<td><a href=item23.html>Item23</a></td>
+<td><a href=item24.html>Item24</a></td>
+<td><a href=item25.html>Item25</a></td>
+<td><a href=item26.html>Item26</a></td>
+</tr>
+</table>
+
+<p><em><strong>Archivist's Note: </strong></em>The content above was found in this folder and doesn't seem to quite correspond to the way the puzzle was presented to the solvers at hunt time, as seen in the following image:</p>
+
+<img src="nagoya-huntversion.jpg" style="width: 80%; height: auto;"> 
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/nairobi.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/nairobi.html
new file mode 100644
index 0000000000000000000000000000000000000000..2fc96c867986c20732e31944ff224d582e9698ee
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/nairobi.html
@@ -0,0 +1,106 @@
+<html>
+<head>
+<title>Nairobi</title>
+
+<style>
+.square {
+ letter-spacing: 4px;
+ line-height: 14px;
+ font-size: 16px;
+}
+</style>
+
+</head>
+<body>
+
+<h1>Nairobi</h1>
+
+<img src="pie.jpg">
+
+<!--Also needs fixed-width font; the shapes below
+need to be squares instead of rectangles. Also, very important...need to take
+HTML-unhappy characters out of the text at bottom.-->
+<br>
+
+<pre class="square">
+######################################
+##############           #############
+###########                 ##########
+#########                     ########
+########                       #######
+#######                         ######
+######                           #####    ###############**#################
+#####**                           ####    ##############* *#################
+######**                           ###    #############** **################
+#######**                          ###    ############**   *################
+########**                          ##    ###########**    **###############
+##########*                         ##    ##########**      *###############
+###########**                       ##    #########**       **##############
+############**                       #    ########**         *##############
+#############**                      #    ########*          **#############
+##############**                     #    #######*            *#############
+###############**                    #    ######**            **############
+################**                   #    #####**              *############
+##################*                  #    ####**               **###########
+################***                  #    ####*                 *###########
+##############***                    #    #####                 **##########
+############***                      #    ######                 *##########
+##########***                        #    ########               *##########
+########***                          #    ###########           ############
+######***                           ##    ##################################
+####***                             ##
+##***                               ##
+##                                 ###
+###                                ###
+###                               ####
+####                             #####
+#####                           ######
+######                         #######
+#######                       ########
+########                     #########
+##########                 ###########
+#############           ##############
+######################################
+</pre>
+
+<p><br><br>
+
+ws9asw@@sz8!as9@@qwsf9#$qi!s$9ikq7f$eswqg!!cq9elsz!!5qwqap~<br>
+is~i!vq9e5q9~cswzqifw~qw~q!cs!8qif9iqw~qm!!5s!8qepi8wiw!p~k<br>
+sifw~q9@9g8wils7w@@q@9e5qalsz9aw@lqe!is9qe!~fk<p>
+
+f^u8((8u*(tr^u^(elae6*uory4lar8^u6ar22lr8*6u%e8838blt(k8u^(<br>
+e%l&amp;r8*6)lrub((tlkr^l*(lt(u*o36l36l*(lmea&amp;u38lrlf(k2l(nlmra<br>
+)uf^la3t83bo*ln4ku(nl^(e%l6ar22u6*3$i^l&amp;r26uk322lkr8*u*(l*r<br>
+2iurf(e*u3*<p>
+
+9o+{sola{sonicey:ozypeb{3o3pceb{cbyoui3e93e{3soz{sey{te{aao<br>
+niceaptche{cocy{ce9e}3:ze{owisezypey{fe{o+9aa9p3efpaa{gtoni<br>
+cez{tetpef{g3otc{9fe{e+p3:sn{wobptcey9+e{otpiah<p>
+
+&lt;ho&lt;1hney&lt;ehwrly5&lt;1hd&lt;e1uye9dhm&lt;rayt9wduh&lt;rwclylcqneihzceyg<br>
+n11xyumwq1h&lt;elymr&lt;xayny&lt;thrwwgneiyzwqy&lt;eh&lt;11q&lt;o1nwey1wh5n1o<br>
+5ycmy1whzwqy1dwywzhtxyu5nz1uhwzylc1xahut&lt;q1xho&lt;1<p>
+
+?xq.zxjsutjx.zha3.zxmj3.zaj1xqp?rtam?upxkjupap.ztcxkjsztauj<br>
+a.zxsnrhacm.13ajoxkd.cucampjaq.zxc&gt;?rrakrjjta.ztxnsuca.cays<br>
+?q4a.cx.zhjzda3?npuam?cpx.ua>suu?zna.xp.uajz<p>
+
+ramsteimnlck5mli2f5ztxmstefxtc6qmxtiisfqnlqmylz5folzzrcumai<br>
+tcqf52lqfrcmsteifolifxtc6qmneiisfecztodrcumsteifkttifrc5q2l<br>
+kmtafarwrcuflfzlym5qily3fpeqframstefolqonflmzraqjfstem5ntez<br>
+k3mlzztxmg2<p>
+
+<p><em><strong>Archivist's Note:</strong></em> The content above appears to be different from the version presented to solver at hunt time, seen in <a href="nairobi-hunttime.pdf">this PDF</a>.</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/new_orleans.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/new_orleans.html
new file mode 100644
index 0000000000000000000000000000000000000000..ad47ab3fb829e92d151ebad819eca18a95933f60
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/new_orleans.html
@@ -0,0 +1,50 @@
+<html>
+<head>
+<title>New Orleans</title>
+</head>
+<body>
+
+<h1>New Orleans</h1>
+
+<table border=0 cellspacing=5>
+<tr><td align=center><tt>
+1-6-93    </tt></td>
+<td align=center><tt>6-19-93
+</tt></td></tr><tr><td align=center><tt>
+4-27-93   </tt></td>
+<td align=center><tt>1-18-94
+</tt></td></tr><tr><td align=center><tt>
+4-19-94   </tt></td>
+<td align=center><tt>2-25-94
+</tt></td></tr><tr><td align=center><tt>
+8-14-94   </tt></td>
+<td align=center><tt>3-28-94
+</tt></td></tr><tr><td align=center><tt>
+11-14-94  </tt></td>
+<td align=center><tt>1-25-95
+</tt></td></tr><tr><td align=center><tt>
+2-13-95   </tt></td>
+<td align=center><tt>8-17-95
+</tt></td></tr><tr><td align=center><tt>
+5-11-95   </tt></td>
+<td align=center><tt>9-3-95
+</tt></td></tr><tr><td align=center><tt>
+5-15-95   </tt></td>
+<td align=center><tt>1-15-96
+</tt></td></tr><tr><td align=center><tt>
+5-3-96    </td>
+<td align=center><tt>10-9-96
+</tt></td></tr><tr><td align=center><tt>
+12-14-96  </tt></td>
+<td align=center><tt>7-1-96
+</tt></td></tr><tr><td align=center><tt>
+          </tt></td>
+<td align=center><tt>-2--1-
+</tt></td></tr><tr><td align=center><tt>
+          </tt></td>
+<td align=center><tt>4---3
+</tt></td></tr></table>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/new_york_city.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/new_york_city.html
new file mode 100644
index 0000000000000000000000000000000000000000..0d79f6b25be60b9eac8f2441a66df2a428daabbe
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/new_york_city.html
@@ -0,0 +1,89 @@
+<html>
+<head>
+<title>New York City</title>
+</head>
+<body>
+
+<h1>New York City</h1>
+<p>
+This puzzle is a scavenger hunt to test your skills at gathering
+evidence. Please bring us items that can be described by these
+adjectives: 
+</p>
+<blockquote><table><tr>
+	<td>
+adjustable <BR>alliterative <BR>alphabetical
+<BR>antique <BR>banned <BR>bifurcated <BR>black-and-white
+<BR>bleached <BR>broken <BR>certified <BR>chocolate*
+<BR>classified <BR>complete <BR>concave <BR>convex
+<BR>cordless <BR>crustaceous <BR>crystalline
+	</td>
+	<td>
+custom-made <BR>distilled 
+<BR>electronic <BR>expired <BR>extinct <BR>flammable
+<BR>flat <BR>folding <BR>free <BR>hollow <br>home-cooked* <BR>igneous
+<BR>inflammable <BR>inflatable <BR>infrared <BR>inside-out
+<BR>knotted <BR>lenticular
+	</td>
+	<td>
+mechanical <BR>microwave <BR>molded
+<BR>mucilaginous <BR>obsolete <BR>octagonal
+<BR>onomatopoetic <BR>ovoid <BR>patented <BR>perforated
+<BR>phosphorescent <BR>plaid <BR>platonic <BR>polka-dotted
+<BR>postmarked <BR>prefabricated <BR>radioactive
+<BR>red-white-and-blue
+	</td>
+	<td>
+reversed <BR>romantic <BR>sealed <BR>short
+<BR>silk-screened <BR>slimy <BR>smooth <BR>spherical
+<BR>sterile <BR>striped <BR>symmetrical <BR>tall
+<BR>thixotropic <BR>three-dimensional <BR>toroidal
+<BR>transparent <BR>ultraviolet <BR>upside-down
+	</td>
+</tr></table></blockquote>
+<p>Here are the rules:</p>
+<ol>
+<li>For each object, you will receive 7 points if the object can be 
+described by one adjective, 20 points if it can be described by two 
+adjectives, 35 for three, 196 for ten, etc., i.e., (10N+N^2-4) for N.</li>
+
+<li>You must bring us objects totalling 750 points. If you can find a 
+single
+object that can be described by 27 of the adjectives (and therefore worth
+752 points), you only need to bring us that one object.</li>
+
+<li>You will get 10 extra points for the
+adjectives marked with *s; any such items will be kept
+by the judges.</li>
+
+<li>The standard for each adjective/object is whether or not
+the answer to the question "Is that &lt;object&gt; &lt;adjective&gt;?"
+would be yes. E.g., if one of the adjectives was "purple"
+and you brought us a Barney doll, the question would be "Is
+that doll purple?". Interpretation of the question is in the
+opinion of the judges although you are welcome to offer
+suggestions.</li>
+
+<li>The teams bringing us (1) the highest point object and
+(2) the fewest objects totalling 750 points will each
+receive a bonus. If this is the same team, they will get two
+bonuses.</li>
+
+</ol>
+<p>Some restrictions:</p>
+<ol>
+<li>You may only count each adjective once.</li>
+
+<li>You must bring us actual objects. We will not accept the following:
+photographs, drawings or written depictions of objects. Objects must be
+portable -- you must actually bring them to us.</li>
+
+<li>We will not accept: anything created, fabricated or modified for this
+scavenger hunt, anything illegal, living animals or anything containing
+living animals (including humans).</li>
+</ol>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/paris.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/paris.html
new file mode 100644
index 0000000000000000000000000000000000000000..53746e47f6807d68f281dc63890682c00ef1bd99
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/paris.html
@@ -0,0 +1,36 @@
+<html>
+<head>
+<title>Paris</title>
+</head>
+<body>
+
+<h1>Paris</h1>
+
+<p> Note from the author: I am not much a fan of poetry but I figured
+I should overcome that, so I thought I would try to write one
+myself. However, I had a bit of a writers block with one of the
+words. I know it could be a great poem, if only you could help me fill
+in the missing word. </p>
+
+<h2>Die, Art!</h2>
+
+<p>
+<b>With</b> us <b>left</b> at <i>mit</i>, no <i>links</i> <b>must</b> be allowed to <i>muss</i> up our <b>day</b>. 
+</p><p>
+<b>Earth</b> may <i>Tag</i> a <b>stale</b> <i>Welt</i> on my <b>ass</b> (<i>fad</i> only).
+</p><p>
+<i>After</i> <b>far</b> <b>search</b> for <i>fern</i> that can <b>load</b> <i>such</i> <b>varnish</b>, every <i>Last</i> <b>fairy</b> on the <b>shelf</b>, <i>Lack</i> <i>Fee</i> of a <i>Regal</i> <b>plate</b> of <b>song</b>.
+</p><p>
+<b>Seaweed</b> fortune <i>Teller</i> <i>Lied</i>, but long <b>ago</b>, <i>Tang</i> in <i>her</i> <b>bathroom</b> did <b>loom</b> over <b>pickle-juice</b>. 
+</p><p>
+Against <i>rage</i> and <i>Bad</i> <b>council</b>, I <b>am</b> a <i>bin</i> of <b><i>Lake</i></b> <i>Rat</i> corpses.
+</p><p>
+ <b>They</b> <i>See</i> a <b>good</b> <i>man</i>, with <b>empty</b> <i>gut</i>, watch <b>eleven</b> goats <i>leer</i> eerily.
+</p><p>
+<b>Nearly</b> every <i>elf</i> is <b>large</b> and _________. 
+</p><p>
+Every <b>maggot</b> <<i>gross</i>!> (<i>fasten</i> check here) <b>has</b> <i>Made</i> a <b><i>hat</i></b> or a <b>red</b> <i>Hut</i> of <i>rot</i>.
+</p>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/perth.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/perth.html
new file mode 100644
index 0000000000000000000000000000000000000000..f16aa18659461aacb695093b8adb976bae44e3bf
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/perth.html
@@ -0,0 +1,48 @@
+<html>
+<head>
+<title>Perth</title>
+</head>
+<body>
+
+<h1>Perth</h1>
+
+<p>
+An Acme detective says, "Acting on an anonymous tip, I broke into a back room at the Post. Laid out in type was a message that gave crucial information for decoding a secret message in an upcoming radio broadcast. I stole the type and set fire to the office in order to conceal the theft. Unfortunately, the columns of the message got scrambled. You'll need to reconstruct it quickly because the broadcast is sometime tomorrow morning." 
+</p>
+
+<p>
+Here are the type columns:
+<pre>
+D D E E E E E I I I K L N N N O O S T T T W
+E N A H L R S A I P N W E E I C N T A H L E
+I Y N O T M R P N N E K H I H A I W H I G N
+T C E R S E L L A H P R A S O A V N L D E E
+A H S R L E N W T N I T T R E E T W T O S E
+E T M R X H N O I R A W O D T R F T O H W O
+</pre>
+</p>
+
+<p>
+<em><strong>Archivist's Note: </strong></em>At hunt time, the solution to the above would lead you to the following content:
+</p>
+
+<blockquote>
+<p>
+	"I'm going to give you 2 rhyming words. You give a 3rd word that can follow each of mine to complete a compound word or familiar 2-word phrase. For example, if I said "Wish" and "Fish," you'd say BONE (as in Wishbone and fishbone)." 
+
+<ol>
+	<li>Early, Whirly</li>
+	<li>Pool, School</li>
+	<li>Band, Grand</li>
+	<li>Fair, Stair</li>
+	<li>Knot, Pot</li>
+	<li>View, Dew</li>
+	<li>Cue, Screw</li>
+	<li>Jack, Crack</li>
+	<li>[a triple] Dead, Head, Bread</li>
+</ol>
+</p>
+</blockquote>
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/phnom_penh.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/phnom_penh.html
new file mode 100644
index 0000000000000000000000000000000000000000..c6a2acce1b0ea7f2d777916e2891bda2b9ce1550
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/phnom_penh.html
@@ -0,0 +1,15 @@
+<html>
+<head>
+<title>Phnom Penh</title>
+</head>
+<body>
+
+<h1>Phnom Penh</h1>
+
+
+<IMG src="phnom_penh.jpg">
+
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/prague.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/prague.html
new file mode 100644
index 0000000000000000000000000000000000000000..90c701aa56be0ebf45ae7a44a7b4384870fdc890
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/prague.html
@@ -0,0 +1,56 @@
+<html>
+<head>
+<title>Prague</title>
+</head>
+<body>
+
+<h1>Prague</h1>
+
+<p>All good ACME detectives should be subscribed to reuse, or if not, should read the reuse discuss meeting. <p>
+<br>
+<p><em>Archivist's Notes:</em></p>
+<p>The following message was posted to reuse (an MIT mailing list that is the equivalent of Craigslist free stuff) at 8:50PM on the first day of the hunt:</p>
+
+<pre style="background: #ddd; padding: 20px; font-weight: bold;">
+Subject: Floppies from Prague up for grabs in 24-6! 
+To: reuse@MIT.EDU
+Cc: pocky@MIT.EDU, guy-gerr@vile.com
+Reply-To: acme@MIT.EDU
+Date: Fri, 15 Jan 1999 20:50:41 EST
+From: Daniel P Kamalic
+
+These just came in. We don't have any computers that
+they'll _fit_ in, so we figured we'd offer them to you.
+
+Hard-core reusers and gumshoes alike will find magnetic media waiting
+for them on the 6th floor of Building 24 (ESG). (Granted, the ones for
+the gumshoes will only be given out one at a time.) Give us a call or an
+email if and when you figure something out. 
+
+Thanks,
+Dan
+
+------Forwarded Message
+
+To: acme 
+Cc:
+Subject: Old Software
+Date: Fri, 15 Jan 1999 20:17:09 EST
+From: "Guy Gerr"
+
+You ACME losers might be interested ln this cruft! We got it in a
+shipment from Prague! 
+
+Guy Gerr
+V.I.L.E.
+
+-------End of Forwarded Message 
+</pre>
+
+<p>When the teams showed up in ESG, they were given a 5.25" floppy disk (in addition to hunt-specific floppy disks, the organizers also had empty disks on hand in case random reuse subscribers would show up asking for one). The floppies contained an <a href="reusefind">executable file named <strong>reusefind</strong></a>. Once you figured out what to do with this executable (see <a href="solution.html">solution</a> for an explanation), you would find another pile of floppies, with a sign above them that read: "<em><strong>Without</strong> a programmer to write the software and a platform to run it on, you're left with a pretty stupid system.</em>" This floppy contained a <a href="puzzle">plain text file named <strong>puzzle</strong></a>.</p>
+
+
+<p><a href="solution.html">Solution</a></p>
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/san_francisco.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/san_francisco.html
new file mode 100644
index 0000000000000000000000000000000000000000..ad6243358a63d12f8cf39774e07e42c291b65737
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/san_francisco.html
@@ -0,0 +1,21 @@
+<html>
+<head>
+<title>San Francisco</title>
+</head>
+<body>
+
+<h1>San Francisco</h1>
+
+<p>
+Please send two people only to our offices to witness a crime. Later you will be given a lineup and asked to pick the crooks out of it.
+When you do the calculations for the puzzle eventually, it will be important to remember to include the space.
+</p>
+
+
+<p><em><strong>Archivist's Note</strong></em>: One of the solving teams had <a href="solvinggrid.pdf">this grid</a> to solve this puzzle. It
+   is not known whether they made this grid themselves, or if it was given out by the writing team.
+</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/santiago.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/santiago.html
new file mode 100644
index 0000000000000000000000000000000000000000..2875353c96a4849eab26f878b07c94c21054cfd8
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/santiago.html
@@ -0,0 +1 @@
+<html>
<head>
<title>Santiago</title>
</head>
<body>

<h1>Santiago</h1>
<img src="santiago.jpg">
<p><a href="solution.html">Solution</a></p>
</body><script type="module" src="/checkanswer.js"></script>
</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/sao_paulo.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/sao_paulo.html
new file mode 100644
index 0000000000000000000000000000000000000000..fa19d66933157610ee583c7961205a4e5752e0f7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/sao_paulo.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>Sao Paulo</title>
+</head>
+<body>
+
+<h1>Sao Paulo</h1>
+
+
+<p>Spoonternyms are two words that are spoonerized antonyms, like
+"whack" and "blight". For each of the words below, find its spoonternym.
+Arrange these new words in alphabetical order and extract the
+6th, 9th, 14th, 17th, 19th, 27th and 30th
+letters and rearrange those to form the final answer.</p>
+
+<ul style="list-style-type:none;">
+<li>bricks</li>
+<li>cell</li>
+<li>gate</li>
+<li>hiss</li>
+<li>hold</li>
+<li>mess</li>
+<li>sigh</li>
+<li>that</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/seattle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/seattle.html
new file mode 100644
index 0000000000000000000000000000000000000000..4755b5e181b1ae5d708800d42c43f97829fd1e91
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/seattle.html
@@ -0,0 +1,41 @@
+<html>
+<head>
+<title>Seattle</title>
+</head>
+<body>
+
+<h1>Seattle</h1>
+
+<pre>
+                            A. VP Henry Wilson was known as the "35 120 95 63 126 17 Cobbler."
+                   B. Aaron Burr was the first VP to serve as an 41 24 104 125 81 18 58 in the armed forces.
+                   C. Not yet VP, George Bush spoke of Reagan's "52 82 3 31 103 48 economics."
+                                D. Bush also gave us the phrase "25 94 71 14 45 33 doo-doo."
+                                                  E. As a young 119 22 97 108 36, Henry Wilson's surname was Colbath.
+           F. Calvin Coolidge, a taciturn man, rarely showed his 89 2 118 39 100 19 55 76.
+                                              G. Scandal dogged 124 64 116 83 10 133 37 107 Colfax, VP to [Word N].
+                   H. John Adams came from Massachusetts, unlike 88 32 128 7 68 80 44 65 106 73 115 like Johnson and Gore.
+                                       I. The unfortunate Garret 16 123 79 42 129 85 54 69 Hobart died in office.
+                                J. Any newly elected VP basks, or 6 86 62 127 113 49, in the glory of the office.
+                  K. The winning slogan in 1840: "Tippecanoe and 28 109 121 5 51 too."
+L. Adams on the VP: "the most insignificant office that ever the 70 101 117 57 78 21 114 91 11 of man contrived..."
+                                                 M. ... and John 90 9 38 40 72 Garner: "not worth a bucket of [word O]."
+                                                             N. 112 26 1 84 59
+                                                              O. 60 12 92 122 27 66 77 47
+               P. VPs don't get memorialized with a big Egyptian 61 132 23 46 93 15 99 like the Washington monument.
+           Q. Have you read Alben Barkley's autobiography, "That 67 105 131 29 lll 56 98 13 50"?
+        R. Some VPs later take ab oath to preserve, protect and 102 134 20 110 43 4 74 96 34 Constitution.
+S. Richard Nixon posed for a photo with the singer of "Return To 75 53 30 8 130 87".
+
+1N     2F 3C 4R 5K 6J 7H     8S 9M 1OG     11L 12O 13Q 14D 15P 16I 17A 18B     19F 20R     21L 22E 23P     24B 25D 26N 27O 28K
+29Q 30S 31C 32H 33D 34R 35A 36E 37G 38M 39F     40M 41B 42I 43R 44H 45D 46P     47O 48C     49J 50Q 51K 52C 53S     54I 55F
+56Q 57L 58B     59N 60O 61P     62J 63A 64G 65H     66O 67Q 68H 69I 70L 71D 72M 73H 74R 75S     76F 77O 78L 79I 80H     81B 82C
+83G 84N 85I 86J 87S 88H 89F 90M 91L 92O     93P 94D     95A 96R 97E 98Q     99P 100F 101L 102R     103C 104B     105Q 106H 107G
+108E 109K     110R 111Q 112N 113J 114L 115H 116G     117L 118F 119E 120A 121K     122O 123I 124G 125B 126A     127J 128H 129I
+130S 131Q 132P 133G 134R.
+</pre>
+
+<p><a href="solution.html">Solution</a></p>
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/seoul.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/seoul.html
new file mode 100644
index 0000000000000000000000000000000000000000..1a99836d2d400c670d72f3062a566d90df89a32c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/seoul.html
@@ -0,0 +1,130 @@
+<html>
+<head>
+<title>Seoul</title>
+</head>
+<body>
+
+<h1>Seoul</h1>
+
+<p>Ak Mi says, "As instructed, I was pretending to be a tourist admiring
+the Kwanghwamun Gate when a squadron of cadets marched past. The last cadet
+in line looked at me, winked, and dropped a piece of paper into a trash
+receptacle. I retrieved it and it turned out to be a crossword puzzle which
+is much too difficult for me to solve. I'm sure it's a clue to the location
+of the VILE headquarters in Seoul."</p>
+
+
+<FONT FACE="Courier New" SIZE=2><P><IMG SRC="seoul.gif"></P>
+<div style="display:inline-block; width:45%;">
+<BR><strong>Across</strong>
+<BR>1 Hickory fruit
+<BR>7 Censors
+<BR>12 Identical
+<BR>16 Missile type
+<BR>17 Mayan month
+<BR>18 Salzburg tourist village
+<BR>19 Seem
+<BR>20 Lamp contents, sometimes
+<BR>21 Hebrew prince
+<BR>22 FDA office responsible for oversight of the Prescription Drug User Fee Act
+<BR>23 Cocoon inhabitant
+<BR>25 Marred
+<BR>27 Goof
+<BR>28 Sane
+<BR>31 A Hawaiian timber tree
+<BR>32 Sea serpent's home?
+<BR>34 Ridicule
+<BR>36 Buckthorn
+<BR>40 Christie plot
+<BR>44 ___ Chi
+<BR>45 Portuguese noble
+<BR>48 Sped
+<BR>49 UniSource Energy Corporation (abbr.)
+<BR>50 Greek letter
+<BR>51 Chow
+<BR>53 Liner
+<BR>54 Cal broke his record
+<BR>55 Family vehicle
+<BR>56 Curved
+<BR>58 Hearts
+<BR>60 Yalie
+<BR>61 Bugs' dessert?
+<BR>63 "The Adventures of ___ Bartmoss" (pseudo-e-zine)
+<BR>65 A member of a certain Peruvian tribe
+<BR>66 Tropical American dog
+<BR>70 From (suff.)
+<BR>72 Lascivious one
+<BR>75 Clod
+<BR>76 Pertaining to butt muscles
+<BR>80 Thought
+<BR>81 Afghan currency unit
+<BR>82 Tilt
+<BR>83 Kudo
+<BR>86 An acrylic plastic
+<BR>88 Aoudad
+<BR>89 Urticaria
+<BR>90 EuroLaser Academy Network for Educational Tools (abbr.)
+<BR>91 Marmaduke, e.g.
+<BR>92 Mayan dialect
+<BR>93 Sun ___ (Bicycle racing component manufacturer)
+</div>
+<div style="display:inline-block; width:45%;">
+<strong>Down</strong>
+<BR>1 Appreciator of certain pheasant displays?
+<BR>2 Die
+<BR>3 Dealers
+<BR>4 Acme nom?
+<BR>5 Certain tides
+<BR>6 Swell
+<BR>7 Imaginary problem
+<BR>8 Rest
+<BR>9 Place to stay
+<BR>10 Shelled out
+<BR>11 Glossy
+<BR>12 An Israelitish subtribe (Ezra, Nehemiah)
+<BR>13 Bead computer (var.)
+<BR>14 Junior Achievement management competition
+<BR>15 Oklahoma city
+<BR>24 Iago's lament?
+<BR>26 Front of a ship's main platform
+<BR>29 Narrow strip of wood
+<BR>30 ___ Jesse Drecker Jr. (Zimbabwe Harare Mission President 1990-1991)
+<BR>33 Convenience store
+<BR>35 Wheel of Fortune, e.g.
+<BR>37 USS ___ (SS-403)
+<BR>38 Estate
+<BR>39 ___ Writer (Hebrew/English/Yiddish word processing program)
+<BR>41 Family containing the forsythia
+<BR>42 A member of a Nigerian tribe
+<BR>43 Brown tint
+<BR>45 Temperature
+<BR>46 ___ Pilsen (beer from Peroni)
+<BR>47 ___ Technology (health care information systems company)
+<BR>52 Astronomical organization whose newsletter is "New Horizons"
+<BR>57 Venetian magistrate
+<BR>59 Parrot variety
+<BR>62 Nozzle
+<BR>64 Movie director MacDonald
+<BR>67 Jogging
+<BR>68 "And now no soil nor ___ doth besmirch the virtue of his will" (Hamlet)
+<BR>69 A eucharistic wafer
+<BR>71 Hebrew prophet
+<BR>73 Congerer
+<BR>74 A Chilean timber tree
+<BR>76 The man from ____
+<BR>77 Italian currency
+<BR>78 US Mission to the United Nations (abbr.)
+<BR>79 The monk parrot
+<BR>84 Little knots formed during ginning
+<BR>85 Harem room
+<BR>87 John
+<BR>
+<BR>
+</div>
+</FONT>
+<br><br>
+<div>
+<a href="solution.html">Solution</a>
+</div>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..f8ed461be668e58643f52f1b16bcfcabe6cc5c35
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/solution.html
@@ -0,0 +1,41 @@
+<html>
+	<head>
+		<title>Seattle Solution</title>
+    </head>
+<body><h1>Seattle: Solution</h1>
+<p>The clue answers, in order, are:</p>
+<ol type="A">
+<li>NATICK</li>
+<li>OFFICER</li>
+<li>VOODOO</li>
+<li>IN DEEP</li>
+<li>CHILD</li>
+<li>EMOTIONS</li>
+<li>SCHUYLER</li>
+<li>TENNESSEANS</li>
+<li>AUGUSTUS</li>
+<li>REVELS</li>
+<li>TYLER</li>
+<li>INVENTION</li>
+<li>NANCE</li>
+<li>GRANT</li>
+<li>WARM SPIT</li>
+<li>OBELISKS</li>
+<li>REMINDS ME</li>
+<li>DEFEND THE</li>
+<li>SENDER</li>
+</ol>
+<p>This makes the quotation be "A MODERN DAY NAMESAKE OF THE FIRST
+INDEPENDENT COUNSEL TO SERVE UNDER TWO VICE PRESIDENTS SINGS COUNTERTENOR
+IN THIS KIND OF EARLY ENGLISH VOCAL MUSIC ENSEMBLE." The independent counsel
+is a rather modern invention as it is, and the rest of the clue does not really
+agree with it.</p>
+<p>The acrostic in the answers spells NO VICE STARTING WORDS. If you
+eliminate the words starting with V, I, C, or E from the quotation, what is
+left spells the much more sensible "A MODERN DAY NAMESAKE OF THE FIRST TO
+SERVE UNDER TWO PRESIDENTS SINGS THIS KIND OF MUSIC." George Clinton in the
+early 1800s was the first vice president to serve under two presidents, and his
+modern day namesake musician George Clinton is best known for <strong>FUNK</strong> music.</p>
+
+</body>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/stuttgart.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/stuttgart.html
new file mode 100644
index 0000000000000000000000000000000000000000..0def87ac6276dce1c27f9c7ff54469caaad97e26
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/stuttgart.html
@@ -0,0 +1,76 @@
+<html>
+<head>
+<title>Stuttgart</title>
+</head>
+<body>
+
+<h1>Stuttgart</h1>
+
+<p>
+<TABLE WIDTH="50%">
+<TR>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>&nbsp;:&nbsp;</TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER><U>&nbsp;&nbsp;&nbsp;</U></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>&nbsp;::&nbsp;</TD>
+</TR>
+<TR>
+  <TD><FONT SIZE="6"><B>
+<CENTER>1</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>2</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>3</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>4</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+&nbsp;</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>5</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>6</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>7</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+<CENTER>8</CENTER></TD>
+  <TD><FONT SIZE="6"><B>
+&nbsp;</TD>
+</TR>
+</TABLE>
+</p>
+
+<p>
+<OL>
+  <LI>0-55653-67050-6 (first)</li>
+  <LI>0-447440-7 (second of size)</li>
+  <LI>0-30100-03012-6 (second)</li>
+  <LI>0-73410-29061-3 (second)</li>
+  <LI>0-33617-41001-6 (third of flavour)</li>
+  <LI>0-74472-75810-3 (third of brand)</li>
+  <LI>0-441190-3 (third)</li>
+  <LI>0-44000-00376-0 (eighth of sub-brand)</li>
+</OL>
+</p>
+
+
+<p><i>Archivist's note</i>: The teams were also given a cube of Edam cheese.</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/taipei.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/taipei.html
new file mode 100644
index 0000000000000000000000000000000000000000..a21ee1f6fde1abc0682a972b16a9ed8b27c58d9f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/taipei.html
@@ -0,0 +1,15 @@
+<html>
+<head>
+<title>Taipei</title>
+</head>
+<body>
+
+<h1>Taipei</h1>
+
+<p>The answer is a single word.</p>
+
+<img src="taipei.jpg"><br>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/tbilisi.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/tbilisi.html
new file mode 100644
index 0000000000000000000000000000000000000000..e1085372b50a6cc9e6c680bfefaecde344186774
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/tbilisi.html
@@ -0,0 +1,310 @@
+<html>
+<head>
+<title>Tbilisi</title>
+</head>
+<body>
+
+<h1>Tbilisi</h1>
+
+
+<div align="left">
+
+  <table border="1" width="100%" cellspacing="0" cellpadding="0" bordercolordark="#000000" bordercolorlight="#000000" bordercolor="#000000">
+
+    <tr>
+
+      <td width="11%" bgcolor="#000000">&nbsp;</td>
+
+      <td width="11%" align="center"><font face="Arial Black">8 PM</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">8:30</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">9 PM</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">9:30</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">10 PM</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">10:30</font></td>
+
+      <td width="11%" align="center"><font face="Arial Black">11 PM</font></td>
+
+      <td width="12%" align="center"><font face="Arial Black">11:30</font></td>
+
+    </tr>
+
+    <tr>
+
+      <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">6</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WRGB</font></td></tr></table></td>
+
+      <td width="44%" valign="top" colspan="4"><font size="2">The Wonderful World of Disney:
+
+        Honey, I Shrunk the Kids, Rick Moranis ***</font></td>
+
+      <td width="22%" valign="top" colspan="2"><font size="2">The 10 O'clock News
+
+      Hour</font></td>
+
+      <td width="11%" valign="top"><font size="2">Siskel &amp; Ebert at the
+
+        Movies</font></td>
+
+      <td width="12%" valign="top"><font size="2">In the Heat of the Night
+
+        &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+      <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">8</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WLTZ</font></td></tr></table></td>
+
+      <td width="44%" valign="top" colspan="4"><font size="2">Wag the Dog, 1998,
+
+        Dustin Hoffman, Robert De Niro ***</font></td>
+
+      <td width="22%" valign="top" colspan="2"><font size="2">Homicide: Life on
+
+        the Street</font></td>
+
+      <td width="23%" valign="top" colspan="2"><font size="2">It's Showtime at
+
+        the Apollo</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">20</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KOCO</font></td></tr></table></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Sonny and Cher
+
+      Show</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Gary Shandling
+
+      Show</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Larry Sanders
+
+      Show</font></td>
+
+    <td width="12%" valign="top"><font size="2">The 11 O'clock News</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Tonight Show</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">23</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KARE</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Simpsons</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Simpsons</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Simpsons</font></td>
+
+    <td width="11%" valign="top"><font size="2">King of the Hill</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The X-Files</font></td>
+
+    <td width="23%" valign="top" colspan="2"><font size="2">Star Trek: The Next
+
+      Generation</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">26</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KARD</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Waltons</font></td>
+
+    <td width="44%" valign="top" colspan="4"><font size="2">Star Trek: The Wrath
+
+      of Khan, William Shatner, Leonard Nimoy, Ricardo Montalban&nbsp; ****</font></td>
+
+    <td width="34%" valign="top" colspan="3"><font size="2">Conan the Barbarian, Arnold Schwarzanegger, James Earl Jones,
+
+      1982 *** &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">28</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">KOSA</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Price is Right</font></td>
+
+    <td width="11%" valign="top"><font size="2">The Dating Game</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">The Oprah Winfrey
+
+      Show</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2"> Making of the
+
+      X-Files Movie</font></td>
+
+    <td width="23%" valign="top" colspan="2"><font size="2">Little House on the
+
+      Prairie<br>
+
+      </font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">30</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WCBS</font></td></tr></table></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">Star Trek: The Next
+
+      Generation</font></td>
+
+    <td width="45%" valign="top" colspan="4"><font size="2">The Falcon and the
+
+      Snowman, Timothy Hutton, Sean Penn, 1985 ****</font></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">Father of the Bride, Steve Martin,
+
+      1991 *** &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">32</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WHYY</font></td></tr></table></td>
+
+      <td width="11%" valign="top"><font size="2">The Beverly Hillbillies</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Brady Bunch</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Wonder Years</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Love Boat</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Dick Van Dyke Show</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Mary Tyler Moore Show</font></td>
+
+      <td width="11%" valign="top"><font size="2">The Mod Squad</font></td>
+
+      <td width="12%" valign="top"><font size="2">The Wild, Wild West</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">34</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WESH</font></td></tr></table></td>
+
+    <td width="22%" valign="top" colspan="2"><font size="2">&lt;&lt; Cry, The
+
+      Beloved Country, James Earl Jones, ****</font></td>
+
+    <td width="44%" valign="top" colspan="4"><font size="2"> Close Encounters of
+
+      the Third Kind, Richard Dreyfus ***</font><font size="1">1/2</font></td>
+
+    <td width="23%" valign="top" colspan="2"><font size="2">Voyage to the Bottom
+
+      of the Sea, Peter Lorre, 1961 *** &gt;&gt;</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">49</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WREX</font></td></tr></table></td>
+
+    <td width="33%" valign="top" colspan="3"><font size="2">Butch Cassidy and
+
+      the Sundance Kid, Robert Redford, Paul Newman, 1969 ****</font><font size="1">1/2</font></td>
+
+    <td width="56%" valign="top" colspan="5"><font size="2">Return of the Jedi, Mark Hammill, Carrie Fisher,
+
+      Harrison Ford, James Earl Jones ****</font></td>
+
+    </tr>
+
+    <tr>
+
+    <td width="11%" bgcolor="#000000" valign="top"><table><tr><td width=20 align=right>
+
+        <font color="#FFFFFF" face="Arial Black">53</font>
+
+        </td><td align=left><font color="#FFFFFF" face="Arial Black">WHO</font></td></tr></table></td>
+
+    <td width="11%" valign="top"><font size="2">The Addams Family</font></td>
+
+    <td width="33%" valign="top" colspan="3"><font size="2">When
+
+      Dinosaurs Ruled the Earth, Victoria Vetri, Robin Hawdon, 1970 *</font><font size="1">1/2</font></td>
+
+    <td width="11%" valign="top"><font size="2">Dennis the Menace</font></td>
+
+    <td width="34%" valign="top" colspan="3"><font size="2">The Day the Earth
+
+      Stood Still, 1951, Michael Rennie **</font><font size="1">1/2</font></td>
+
+    </tr>
+
+</table>
+
+</div>
+
+<p><em>Archivist's Note:</em> A hint provided to the teams at hunt time indicated that any typos in the grid above are not part of the puzzle.</p>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
+
+
+
+
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/toronto.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/toronto.html
new file mode 100644
index 0000000000000000000000000000000000000000..5a98744cafbe74eebe68251d445aec21ec51d353
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/toronto.html
@@ -0,0 +1,64 @@
+<html>
+<head>
+<title>Toronto</title>
+</head>
+<body>
+
+<h1>Toronto</h1>
+
+<p>Solve each of the bracketed equations. Some of
+the files provided are very long; if you can recognise the song from
+the introduction, you don't have to listen to the entire file (that
+is, the files only contain music; there are no "hidden messages" or
+anything).</p>
+
+<p>You can listen to MIDIs on athena% by using "soundplayer" on the
+SGI (the headphone jack on the Indies is somewhere on the lower side
+of the back right corner).</p>
+
+<P>&nbsp;
+<P>
+
+<TABLE ALIGN="CENTER">
+<TR>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="1a.mid">?</A> - <A HREF="1b.mid">?</A>) +
+      (<A HREF="1c.mid">?</A> - <A HREF="1d.mid">?</A>) + 7]</FONT></TD>
+  <TD><FONT SIZE="5"><B><CENTER>.</CENTER></B></FONT></TD>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="2a.mid">?</A> - <A HREF="2b.mid">?</A>) - 7]</FONT></TD>
+  <TD><FONT SIZE="5"><B><CENTER>.</CENTER></B></FONT></TD>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="3a.mid">?</A> - <A HREF="3b.mid">?</A>) *
+      (<A HREF="3c.mid">?</A> - <A HREF="3d.mid">?</A>) * 7]</FONT></TD>
+  <TD><FONT SIZE="5"><B><CENTER>.</CENTER></B></FONT></TD>
+  <TD><FONT SIZE="5"><CENTER>[(<A HREF="4a.mid">?</A> + <A HREF="4b.mid">?</A> -
+      <A HREF="4c.mid">?</A>) / 7]</FONT></TD>
+</TR>
+</TABLE>
+
+<P>&nbsp;</P>
+
+
+<p><i>Archivist's Note</i>: Solving the above would lead solvers to the following press release:</p>
+
+<pre>
+For immediate release - January 12, 1999
+=============================================================
+Toronto Researcher Indulges in MIT Vices!
+=============================================================
+Toronto, Ont., January 12, 1999-- Neal H. Dorow, senior researcher in
+the Ontario National Ministry of StickY ShiFT-kEys, has just completed
+his sabbatical at the Massachusetts Institute of Technology in
+Cambridge, Massachusetts, USA. While there, he conducted an extensive
+double-blind study of off-campus social life. These are the shocking
+results of his study. Naturally, we are appalled.
+
+wilg - bROthEl
+no. 6 - ENNUI
+epsilon theta - PoLyGamy
+pika - DruGs
+student house - klEPTomaNia
+fenway house - VINDictiveness
+</pre>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/vatican_city.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/vatican_city.html
new file mode 100644
index 0000000000000000000000000000000000000000..b9937cfc4dce231f115962ee383ca53587c2cd8e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/vatican_city.html
@@ -0,0 +1,53 @@
+<html>
+<head>
+<title>Vatican City</title>
+</head>
+<body>
+
+<h1>Vatican City</h1>
+
+
+<p>An informant gives you this message:</p>
+
+<p>"After work yesterday I met with an informant in St. Peter's
+Square. She said she managed to purloin a couple of memos from a VILE
+member's desk, which she gave to me. The first has the following text on
+it:</p>
+<pre>
+VILE:<BR>
+LOVE
+OVER
+VEIN
+ERNE
+</pre>
+
+<p>The second has some curious stories on it that I can't figure out the
+meaning of. Can you help?"</p>
+
+<p>Here are the stories:</p>
+
+<P>Romeo RESTS his ARM JOINT on the gatepost and looks UP.
+He sees a sight more wonderful than all the EXPLODING STARS ever
+viewed - his DARLING Juliet on the balcony.</P>
+
+<P>Pat, on a safari in Africa, LOOKS STEADILY at the STRIPED MAMMAL. The
+animal, KEENLY AWARE, takes umbrage - "Why do you GAWK?" she asks. "If you
+think I don't mind, you're making a MISTAKE."</P>
+
+<P>Jimmy's cat was not IN ITSELF particulary attractive. Still, he couldn't
+help but WORSHIP it. One time, a dog CHASED [it] UP A WOODY PLANT. As the
+cat JUMPED from branch to branch, the boy called for his MORE
+LIFE-EXPERIENCED sister to help. She drove the dog away, climbed up and
+retrieved the cat. How nice.</P>
+
+<P>The scientific group decided to build an ELEMENTARY PARTICLE detector in
+Saudi Arabia. However, The WAY to the facility was in DISPUTE, and the
+local CHIEFTAINS would TURN UP THEIR NOSES at each proposed solution. </P>
+
+<P>CONCERNING my trip to China: I had a great time until a certain TURNING POINT.
+One night, my ENTHUSIASM for eating the exotic food took over and I GORGED
+myself. I then fell ill and had to be taken care of by NURSES.</P>
+
+<p><a href="solution.html">Solution</a></p>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.1.html
new file mode 100644
index 0000000000000000000000000000000000000000..6044e7f55cc0e0d4308990a04bcc401d7caa4080
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.1.html
@@ -0,0 +1,33 @@
+<html>
+<head>
+<title>Warrant 1.1</title>
+</head>
+<body>
+
+<h1>Warrant 1.1</h1>
+<p>
+Sometimes brute force is not the way to catch a crook. Sometimes it takes...
+music. Your mission, should you choose to accept it, is to write and perform
+a heroic ballad for us.
+</p>
+
+<p>Your ballad must:</p>
+<p>
+<ul>
+<li>have words
+<li>be sung in our offices by at least two people together
+<li>run at least two minutes long
+<li>talk about the final struggle with the crook
+<li>make some mention of the ultimate struggle with Carmen
+<li>have an original melody
+<li>have a pun in it
+<li>contain the word "quintessential"
+<li>rhyme (more often than not)
+<li>mention the name of your team
+<li>use at least one adjective from the New York City puzzle
+</ul>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.2.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.2.html
new file mode 100644
index 0000000000000000000000000000000000000000..47ad0fff94017ce302c15968464733ebe0fdb001
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.2.html
@@ -0,0 +1,41 @@
+<html>
+<head>
+<title>Warrant 1.2</title>
+</head>
+<body>
+
+<h1>Warrant 1.2</h1>
+<p>
+Identify these alarming characters, and figure out what each group has in 
+common.</p>
+
+<p>
+<a href="11.jpg">(5, 1)</a>
+<a href="12.jpg">(8, 4)</a>
+<a href="13.jpg">(7)</a>
+<a href="14.jpg">(4, 4)</a></p>
+<p>
+<a href="21.jpg">(3, 5)</a>
+<a href="22.jpg">(4, 6)</a>
+<a href="23.jpg">(5, 5)</a>
+<a href="24.jpg">(9)</a></p>
+<p>
+<a href="31.jpg">(7)</a>
+<a href="32.jpg">(4)</a>
+<a href="33.jpg">(8, 1, 4)</a>
+<a href="34.jpg">(6)</a></p>
+<p>
+<a href="41.jpg">(7, 4)</a>
+<a href="42.jpg">(7)</a>
+<a href="43.jpg">(6)</a>
+<a href="44.jpg">(2, 5)</a></p>
+<p>
+<a href="51.jpg">(5, 4)</a>
+<a href="52.jpg">(5, 5, 8)</a>
+<a href="53.jpg">(8)</a>
+<a href="54.jpg">(7)</a></p>
+
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.3.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.3.html
new file mode 100644
index 0000000000000000000000000000000000000000..d4e2e41cf8e6a868d6b23f54a67422db29e29049
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w1.3.html
@@ -0,0 +1,83 @@
+<html>
+<head>
+<title>Warrant 1.3</title>
+</head>
+<body>
+
+<h1>Warrant 1.3</h1>
+<p>
+Print this puzzle out on a single sheet of paper, and don't forget to have fun!
+</p>
+<p>
+<pre>
+O]AGLX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTPO]ALX|}Kh6dTP
+1AICUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh1AIUG@V50ODFh
+Ff4!|Cb[RSk89DFf4|Cb[RSk89D4|Cb[RSk89D4HO|Cb[RSk89D4HOb[RSk89D4HOb[RSk89D4BYHOb
+dW73URXt12SkNbdW7URXt12SkNW7URXt12SkNW7U{6RXt12SkNW7U{Xt12SkNW7U{Xt12SkNW7]BU{X
+%OBUAthS6lJfG0%OBAthS6lJfGOBA7CthS6lJOBA5E7CthS6lJOBA5E7CthS6lBA5E[&7CthS6lBA5E
+OUK9]NFt5JPQ8YOUK]NFt5JPQ8UK]RHNFt5JPQ8UK]RHNFt5JPQ8UK]RHNFt5J8UK]ZORHNFt5J8UK]
+Vb{B82W4QfFMTdVb{82W4QfFMTd{825ZW4QfFMTd{825ZW4QfFMTd{825ZW4QfTd{8J025ZW4QfTd{8
+?l}TbD%MXY2hWd?l}bD%MXY2hWd?lD%M5IXY2hWd?lD%M5IXY2hWd?lD%M5IXYWd?lbED%M5IXYWd?l
+1N8}Q7WP3?MS!V1N8Q7WP3?MS!V1N8WP3Zf?MS!V1N8WP3Zf?MS!V1N8WP3Zf?!V1NY08WP3Zf?!V1N
+t7b{#[|RX%f26St7b#[|RX%f26St7b#RX%Edf26St7b#RX%Edf26St7b#RX%Ed6St7PIb#RX%Ed6St7
+F43AP!YX{}N]KHF43P!YX{}N]KHF43P!{}N9B]KHF43P!{}N9B]KHF43P!{}N9KHF4T|3P!{}N9KHF4
+KR}4OAL#[Ndt@FKR}OAL#[Ndt@FKR}OALNdtl1@FKR}OALNdtl1@FKR}OALNdt@FKRD?}OALNdt@FKR
+Sl2LhbGO|!T4C@Sl2hbGO|!T4C@Sl2hbGOT4Ck8@Sl2hbGOT4Ck8@Sl2hbGOT48@Sl#92hbGOT48@Sl
+ZI?XM6[kL{h31lZI?M6[kL{h31lZI?M6[kL31lCTZI?M6[kL31lCTZI?M6[kL3CTZIP&?M6[kL3CTZI
+S2bT!t74RBHkZ|S2b!t74RBHkZ|S2b!t74RBZ|S6A2b!t74RBZ|S6A2b!t74RBS6A2GHb!t74RBS6A2
+G|%M8bVB46kdOPG|%8bVB46kdOPG|%8bVB46kPG|!D%8bVB46kPG|!D%8bVB46G|!DIH%8bVB46G|!D
+I9E6bD]X[G053&I9EbD]X[G0539EbP2D]X[G09Eb4RP2D]X[G09Eb4RP2D]X[GEb4RBdP2D]X[GEb4R
+4PV!}Xf?8Bb@]{4PV}Xf?8Bb@]PV}Xf?8Bb@]PV}3EXf?8Bb@]PV}3EXf?8Bb@V}3ED6Xf?8Bb@V}3E
+5OQ{I20[LdP}G?5OQI20[LdP}G?QI20[LdP}G?QXKI20[LdP}G?QXKI20[LdP}QXKI!B20[LdP}QXKI
+AFX0Pt?6}]JHB4AFXPt?6}]JHB4AFXPt?6}]JHB4AFXPt?6}]JHB4AFXPt?6}]JHB4AFXPt?6}]JHB4
+ZHWO[V740?AJMCZHW[V740?AJMCZHW[V740?AJMCZHW[V740?AJMCZHW[V740?AJMCZHW[V740?AJMC
+AE%Yh81TV6FO9]AE%h81TV6FO9]AE%h81TV6FO9]AE%h81TV6FO9]AE%h81TV6FO9]AE%h81TV6FO9]
+2#8k3dBCGKAM]92#83dBCGKAM]92#83dBCGKAM]92#83dBCGKAM]92#83dBCGKAM]92#83dBCGKAM]9
+DbC[ZLf|E?kV32DbCZLf|E?kV32DbCZLf|E?kV32DbCZLf|E?kV32DbCZLf|E?kV32DbCZLf|E?kV32
+@5CtTZWkLQBd1#@5CTZWkBd1#@5CTZWkBd1#@5QKCTZWkBd1#@5QKCTZWk1#@5QKCTZWk1#@LV5QKCT
+L{d0}#|194J!5YL{d}#|1J!5YL{d}#|1J!5YL{kPd}#|1J!5YL{kPd}#|15YL{kPd}#|15YL{!CkPd}
+@6kG&dE4!JTXBW@6k&dE4TXBWGf@6k&dE4TXBWGf@6k&dE4TXBWGf@6k&dTXBWDKGf@6k&dBWDQMKGf
+#TkbKAUIhPX%@Y#TkKAUIX%@YV!#TkKAUIX%@YV!#TkKAUIX%@YV!#TkKAX%@Y}]V!#TkKA@Y}SZ]V!
+JA0NV5@T3StR|hJA0V5@TtR|hQPJA0V5@TtR|hQPJA0V5@TtR|hQPJA0V5tR|h%#QPJA0V5|h%KM#QP
+D4@k#ThLXJt391D4@#ThLt391R%D4@#ThLt391R%D4@#ThLt391R%D4@#Tt391bUR%D4@#T91b26UR%
+K|MLlTP[h3d{J}K|MlTP[d{J}&EK|MlTP[d{J}&EK|MlTP[d{J}&EK|MlTd{J}@2&EK|MlTJ}@F92&E
+UZOVElPD!H#46BUZOElPD#46BUZOElPD#46}HBUZOElPD#46}HBUZOElPD6}HBI?UZOElP}HBtJI?UZ
+0X?{dRWEhF6ClL0X?dRWE6ClL0X?dRWE6ClAIL0X?dRWE6ClAIL0X?dRWElAIL9!0X?dRlAI@TL9!0X
+}8l1|tP2CKILf7}8l|tP2ILf7U4}8l|tP2ILf7U4}8l|tP2ILf7U4}8l|tILf7U4}8l|tILDSf7U4}8
+b7lWH4RF3dQ|kOb7lH4RFQ|kOTBb7lH4RFQ|kOTBb7lH4RFQ|kOTBb7lH4Q|kOTBb7lH4Q8E|kOTBb7
+{N6dtW[GHk!V9K{N6tW[G!V9KlO{N6tW[G!V9KlO{N6tW[G!V9KlO{N6tW!V9K]8lO{NW!VQE9K]8lO
+4#OEb?9L6tkIM{4#Ob?9LkIM{dY4#Ob?9LkIM{dY4#Ob?9LkIM{dY4#Ob?kIM{9FdY4#OkIM[J{9FdY
+|EbDKQCLl0dZIU|EbKQCLdZIUMD|EbKQCLdZIUMD|EbKQCLdZIUMD|EbKQdZIU6RMD|EbKZIUl]6RMD
+5EhJ0K4%dRkW3f5Eh0K4%kW3f]S5Eh0K4%kW3f]S5Eh0K4%kW3f]S5Eh0KkW3fV9]S5Eh0K3fVZN9]S
+#@Kd3bZlYBONG&#@K3bZlONG&#@K3bZlONG&#@PQK3bZlONG&#@PQK3bZlG&#@H7PQK3bZlG@H7}APQ
+95?Lf@}IHb]QZV95?f@}I]QZV95?f@}I]QZV952L?f@}I]QZV952L?f@}IZV95Pk2L?f@}IZVPk2GUL
+%9kGQ#F!2VD8t7%9kQ#F!2VD8t7%9kQ#F!2VD8t7%9kQ#F!2VD8t7%9kQ#F!2VD8t7%9kQ#F!2VD8t7
+AYb94]h8V?{%J6AYb4]h8V?{%J6AYb4]h8V?{%J6AYb4]h8V?{%J6AYb4]h8V?{%J6AYb4]h8V?{%J6
+HD&S]}C2OfEFL{HD&]}C2OfEFL{HD&]}C2OfEFL{HD&]}C2OfEFL{HD&]}C2OfEFL{HD&]}C2OfEFL{
+FG9YWtC}]{01PlFG9WtC}]{01PlFG9WtC}]{01PlFG9WtC}]{01PlFG9WtC}]{01PlFG9WtC}]{01Pl
+CRh|Z[HtVUOIM@CRhZ[HtVUOIM@CRhZ[HtVUOIM@CRhZ[HtVUOIM@CRhZ[HtVUOIM@CRhZ[HtVUOIM@
+SMAtTV}&fWb%7LSMATV}&b%7LSMATV}&b%7LSMA#?TV}&b%7LSMA#?T&b%7LSMA#?T&b[C%7LSMA#?T
+2dDBXk3Nh8%&C|2dDXk3N%&C|2dDXk3N%&C|2dDHJXk3N%&C|2dDHJ3N%&C|2dDHJ3N%&WlC|2dDHJ3
+!TUVk?]FN{60C|!TUk?]F60C|Sf!TUk?]F60C|Sf!TUk?]F60C|SfUk?]91F60C|Sf?]91PhF60C|Sf
+6EGPZT[]9FD3bV6EGZT[]D3bVMU6EGZT[]D3bVMU6EGZT[]D3bVMUGZT[#%]D3bVMUT[#%CO]D3bVMU
+J&f@0Eh]ZAOV?UJ&f0Eh]OV?UG%J&f0Eh]OV?UG%J&f0Eh]OV?UG%f0EhC2]OV?UG%EhC2[9]OV?UG%
+#LhtR65Y!3E2kd#LhR65YE2kd4@#LhR65YE2kd4@#LhR65YE2kd4@hR65!UYE2kd4@65!U7[YE2kd4@
+3dFZ6PM#JRYl?Q3dF6PM#Yl?Qtf3dF6PM#Yl?Qtf3dF6PM#Yl?QtfF6PM1d#Yl?QtfPM1dV|#Yl?Qtf
+}NK&QFAC2t1#Gk}NKQFAC1#Gk}NKQFAC1#G|0k}NKQFAC1#G|0k}NFAC1PB#G|0k}NC1PBDL#G|0k}N
+27X0L39OKP[@Gl27XL39O[@Gl27XL39O[@G{%l27XL39O[@G{%l2739O[Kk@G{%l27O[KkA}@G{%l27
+3Sh[Pl8I9HK|WR3ShPl8IK|WR[C3ShPl8IK|WR[C3ShPl8IK|WR[ChPl8G&IK|WR[Cl8G&4HIK|WR[C
+Y%WA0U|HOC!D[NY%W0U|H!D[N}7Y%W0U|H!D[N}7Y%W0U|H!D[N}7W0U|@%H!D[N}7U|@%WYH!D[N}7
+T&GQ5f{EJ#FKhMT&G5f{EFKhM]DT&G5f{EFKhM]DT&G5f{EFKhM]DG5f{?|EFKhM]Df{?|X%EFKhM]D
+0&bS|QUfI8DM9J0&b|QUfDM9JPV0&b|QUfDM9JPV0&b|QUfDM9JPVb|QUS}fDM9JPVQUS}0?fDM9JPV
+IFO!ASPHQET8UJIFOASPHT8UJLfIFOASPHT8UJLfIFOASPHT8UJLfOASP67HT8UJLfSP67NRHT8UJLf
+K!Zb?JO7NB|P0YK!Z?JO7|P0Y]fK!Z?JO7|P0Y]fK!Z?JO7|P0Y]fZ?JONX7|P0Y]fJONX{27|P0Y]f
+LNd8#&P9fG0A[bLNd#&P90A[bLNd#&P90A[bLNdMQ#&P90A[bLNdMQP90A[bLNdMQP90A23[bLNdMQP
+Pd4}0%YT?fNtKBPd40%YTNtKBPd40%YTNtKBPd4Sl0%YTNtKBPd4Sl0TNtKBPd4Sl0TNb2tKBPd4Sl0
+2@#48O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX92@#8O|%CUJEX9
+GX|[7F4L8%l5TZGX|7F4L8%l5TZGX|7F4L8%l5TZGX|7F4L8%l5TZGX|7F4L8%l5TZGX|7F4L8%l5TZ
+</pre>
+</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w2.1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w2.1.html
new file mode 100644
index 0000000000000000000000000000000000000000..8ee4c945d495e79ab26ecab6ae2dcdb388386cb8
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w2.1.html
@@ -0,0 +1,43 @@
+<html>
+<head>
+<title>Warrant 2.1</title>
+</head>
+<body>
+
+<h1>Warrant 2.1</h1>
+
+<p>Come to us and complete 10 of the following:</p>
+<ul>
+<li>interpretive dance</li>
+<li>human pyramid</li>
+<li>homemade silly putty</li>
+<li>hokey pokey</li>
+<li>do you want to buy a duck</li>
+<li>backrubs</li>
+<li>sing patter</li>
+<li>children's song with motions</li>
+<li>simon says</li>
+<li>four-square</li>
+<li>tell us a story in proto-indo-european</li>
+<li>beat team member at pocket fighter</li>
+<li>make something out of clay</li>
+<li>teach us how to do something</li>
+<li>1000 paper cranes</li>
+<li>sculpture out of Great Stuff</li>
+<li>telephone</li>
+<li>recite the Arpawocky</li>
+<li>role-playing</li>
+<li>do a skit</li>
+<li>who were you in past life??</li>
+<li>tell our fortune/read tarot</li>
+<li>make natal chart for team member</li>
+<li>knit us something</li>
+<li>recite onefish twofish redfish bluefish</li>
+<li>puppet show</li>
+<li>sing alphabet backward without pause</li>
+<li>at least 3 foreign language proverbs and translations</li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w2.2.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w2.2.html
new file mode 100644
index 0000000000000000000000000000000000000000..f073ef2c7913ac7eb1ada4332d9d2f182b37ed95
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w2.2.html
@@ -0,0 +1,23 @@
+<html>
+<head>
+<title>Warrant 2.2</title>
+</head>
+<body>
+
+<h1>Warrant 2.2</h1>
+
+<p>I intercepted the following transmissions. I can't figure out what they
+add up to.</p>
+
+<ul style="list-style-type:none;">
+<li><a href="u1.wav">1</a></li>
+<li><a href="u2.wav">2</a></li>
+<li><a href="u3.wav">3</a></li>
+<li><a href="u4.wav">4</a></li>
+<li><a href="u5.wav">5</a></li>
+<li><a href="u6.wav">6</a></li>
+</ul>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w3.1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w3.1.html
new file mode 100644
index 0000000000000000000000000000000000000000..f39d10e67e5fd852ba364917d77a916fbe4f97b6
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w3.1.html
@@ -0,0 +1,19 @@
+<html>
+<head>
+<title>Warrant 3.1</title>
+</head>
+<body>
+
+<h1>Warrant 3.1</h1>
+
+<p>We have reason to believe that the crook is particularly fond of gingerbread. Thus, to apprehend the crook, we are requesting a sculpture of an animal, made out of gingerbread, to set as bait.</p>
+
+<p>Sources have determined that the crook has a sweet tooth, and thus you are to put on your gingerbread a lot of icing and candied ornamentation.</p>
+
+<p>The sculpture must be three-dimensional (no cookie cutter cut-outs), and again, the sculpture must be in the shape of an animal. The minimum dimensions of the object should be 6" x 6" x 6"; please add an additional 1 cubic inch for every two team members you have after 8. The object may be hollow.</p>
+
+<p>You may deliver the bait to ACME headquarters at any time. Good luck.</p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w3.2.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w3.2.html
new file mode 100644
index 0000000000000000000000000000000000000000..7693d33bf474d205a12ce3456b6e004c8065968f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/1999/1999_puzzles_index.html/w3.2.html
@@ -0,0 +1,32 @@
+<html>
+<head>
+<title>Warrant 3.2</title>
+</head>
+<body>
+
+<h1>Warrant 3.2</h1/p>
+<p>Someone was causing havoc in Bob's son Tom's marriage, and that someone was Jay Stallings.  Jay was married to Tom's ex-wife Carol, but was attracted to Tom's present wife, Natalie.   (1976)</p>
+<p>Even though Natalie was seeing Bob, she was still pining for Dan and she blamed Susan for ruining the relationship.  If Susan hadn't opened her big mouth about taking the tapes, Natalie would be Mrs. Dan Stewart. (1977)</p>
+<p>Natalie, who was carrying Jay's baby, was also short of cash due to her failing company, and she went to Jay for a loan.  Jay turned her down flat, and she vowed to make him pay! (1978) </p>
+<p>Melinda told her half-sister Barbara about her pregnancy, and the family rallied around.  Then she told Annie, who confronted Beau. (1979)</p>
+<p>Both Cricket and Margo were confused about their parents' divorce.  Margo had always sensed that her father, a traveling salesman named Bart Montgomery, had never really loved her. (1980) </p>
+<p>Tom returned home with his new girlfriend, Lyla's younger sister, Maggie Crawford, a lawyer. (1981) </p>
+<p>Bob followed Miranda to Paris where, unbeknownst to him, she was to meet with a drug lord who ordered Miranda never to see Bob again and forced her to say she was having an affair with James Stenbeck.. (1982) </p>
+<p>To escape her troubled marriage to Craig, Betsy went to Ronda, Spain, and Steve followed. (1983)</p>
+<p>Richard sank further into madness, as an apparition of Barbara told him to kill Gunnar without delay.  He tried to slash Gunnar with a razor while he slept. (1984)</p>
+<p>At Easter, longtime friends and onetime lovers Bob and Kim were finally married. (1985)</p>
+<p>As Sierra reeled from the shock that Craig had known all along that Lucinda was her mother, she confronted Lucinda, who tried to explain (1986).</p>
+<p>The new year began with the engagement of Frannie and Seth and the mystery surrounding Frannie Hughes' look alike, Sabrina. (1987)</p>
+<p>Lucinda decided she needed a new golden boy to help run her empire, and that was when Kirk Anderson came to town.  Kirk had several schemes in mind, one of which was sending Dusty off to the London office (1988).</p>
+<p>When Holden called to say he'd be making a trip back home this summer, Lily wondered if she'd made love to Caleb too soon.  The news came that Holden had married Angel Lange in Europe, and, unable to deal with her grief, Lily turned away from everyone. (1989). </p>
+<p>Emily accused Ellie of Brock's murder.  Unfortunately, the messenger who had delivered Brock's gun to Ellie and could have cleared her was found dead in her office. (1990).</p>
+<p>Barbara freaked out when she got a blackmail note about her night with Darryl in Rome.  She assumed it was from Phillipe. (1991).</p>
+<p>Frannie discovered letters that implicated Darryl in the death of his first wife, Carolyn. (1992) </p>
+<p>Edwina wanted to keep Evan from marrying Rosanna, whom Edwina hated for running away from her high society roots (1993). </p>
+<p>As Lisa frantically sought clues to Scott's whereabouts. she was consoled by the company of the dashing Eduardo. (1994) </p>
+<p>After Lily gave birth to a son, Luciano, she made plans to separate from Damian, who'd grown cold and distant. (1995) </p>
+<p>Samantha was left blind and Margo struggled with post-traumatic stress after they survived the plane crash that killed Damian. (1996) </p>
+
+<a href="solution.html">Solution</a>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..7ffbb3fa7c5d16a1e7e44e8f3b9b0095e3fc2a16
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/Puzzle.html
@@ -0,0 +1,185 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Puzzle 2.9
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+2.9: Scavenger Hunt
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+
+Everyone knows that W.I.Z.A.R.D. system administrators have to be
+plied with bribes before they'll help a user...
+</i>
+
+<p>Bring us 10 items described by the following list of adjectives.  Each
+of the items you bring to us must be described by 4 adjectives, one
+from each column.  You will not get credit for using an adjective more
+than once.  If we are satisfied that your objects meet our
+requirements, we'll give you a single clue.  
+</blockquote>
+
+<P>
+       
+<center>
+<TABLE BORDER CELLSPACING=1 CELLPADDING=7 WIDTH=590>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">emerald-colored</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">home-made</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">phosphorescent</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">rare</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">yellow</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">brick</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">outlandish</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">faddy</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">ruby red</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">soft</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">plastic</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">alive</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">platy</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">counterfeit</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">radiant</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">azoic</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">tie-dyed</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">mechanical</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">recycled</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">erotic</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">temperature sensitive</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">broken</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">art deco</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">metallic</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">infantile</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">aquatic</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">fuzzy</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">watery</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">outdated</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">delectable</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">amorphous</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">fluted</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">asymmetric</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">cerulean</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">enormous</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">foreign</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">plaid</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">tacky</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">quadripartite</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">battery-operated</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">rhombic</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">stoichiometric</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">minute</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">prismatic</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">concave</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">unwholesome</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">transparent</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">ribbed</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">sharp</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">classified</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">luxurious</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">variegated</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">oblique</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">xeric</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">certified</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">self-propelling</TD>
+</TR>
+<TR><TD WIDTH="27%" VALIGN="TOP">
+<P ALIGN="CENTER">bulbous</TD>
+<TD WIDTH="23%" VALIGN="TOP">
+<P ALIGN="CENTER">circular</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">fragrant</TD>
+<TD WIDTH="25%" VALIGN="TOP">
+<P ALIGN="CENTER">magnetic</TD>
+</TR>
+</TABLE>
+</center>
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/Solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/Solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..6679760c181b61dc252fa505aa156ff2dcb7817f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/Solution.html
@@ -0,0 +1,60 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Set 2 Metapuzzle (Solution)
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+
+Set 2 Metapuzzle (Solution)
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+
+
+  <pre>
+Author: a group effort
+
+The answers to the ten puzzles can be arranged into pairs that form
+clues for trigrams.  Sort the clues alphabetically, answer the clues,
+and read the trigrams to find the username and password:
+
+  2.10  2.3    ANACHRONISTIC ASSOCIATION  = SCA
+  2.4   2.7    BETAMAX BUTTON             = REC
+  2.2   2.9    COLUMN COMPLEMENT          = ROW
+  2.5   2.8    DEPRESSING DAY             = MON
+  2.6   2.1    E MAJOR, EXEMPLI GRATIA    = KEY
+
+SCARECROW and MONKEY are answers.
+
+This metapuzzle was a group effort.  After hearing about another
+puzzle idea, Brian Tivol recognized that SCARECROW could be split into
+trigrams.  As he explained each trigram, unsure what to do with them,
+Dan Katz noticed that each definition included one or two words that
+started with A, B, or C.  The group came up with two-word clues for
+each of those trigrams, bashed our heads against walls trying to find
+a password with the same property, and then came up with clues for
+those, too.
+
+We were happy that each clue had its words in alphabetical order, but
+were stumped for the Ds.  We thought of DEPRESSING, DREARY, DOWNER,
+and others, and then finally decided that, if someone asked why that
+clue was backwards, we'd simply say that it was poetic: DAY
+DEPRESSING.  One team came up with DAMNABLE; we probably should have
+gone with that.
+  </pre>
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..9072e1a63a390a649b16b12792c2afdcb375dc8a
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/index.html
@@ -0,0 +1,39 @@
+<HTML>

+<HEAD>

+<TITLE>Mystery Hunt 2000, Set 2</TITLE>

+<LINK REV=owns HREF="mailto:puzzle@mit.edu">

+</HEAD>

+

+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"

+VLINK="#000000">

+

+

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<H3>Puzzles, Set 2</H3>

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../index.html">Back to hunt</a>

+  </td></tr></table>

+

+

+<BLOCKQUOTE>

+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>

+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>

+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>

+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>

+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>

+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>

+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>

+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>

+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>

+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>

+<BR>

+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>

+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>

+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/solution2.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/solution2.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6d4747a75d876e5f4f059dd99c1767d0afc60920
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/solution2.txt
@@ -0,0 +1,17 @@
+HINT 2 Solution
+
+Author: Chris Morse
+
+Utilize the one-letter codes for each amino acid in the peptide,
+reading from N-terminus to C-terminus.
+
+T-threonine
+R-asparagine
+I-isoleucine
+G-glyine
+R-asparagine
+A-alanine
+M-methionine
+S-serine
+
+The answer is TRIGRAMS.
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/survey.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/survey.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bea6442560f03c93420e9ab12c218a57a0967fca
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2/survey.txt
@@ -0,0 +1,40 @@
+
+We hope you aren't tired of answering our questions, but there is one
+last set we'd like you to try out.  Your comments will help future
+Hunts from succumbing to our pitfalls and possibly give us a warm
+fuzzy feeling inside.  You can answer either as teams or individuals,
+as you see fit.
+
+1. What is your team's name?
+
+2. How many years has your team competed in the Mystery Hunt?  How
+   many full-time solvers and how many come-and-go solvers were on
+   your team?
+
+3. What are your overall impressions of this year's Hunt?
+
+4. Do you feel as if you'd want to return next year?
+
+5. Did you feel there were any administrative or logistical problems
+   this year that future organizers could be warned about?
+
+6. Is there a specific member of MIPB you'd like to send a message to?
+   Is there a specific puzzle whose creator you'd like to send a
+   message to?
+
+7. Which puzzles did you find to be...
+      ...the most enjoyable?
+      ...the least enjoyable?
+      ...(in)elegant?
+      ...(un)memorable?
+      ...conducive to silly quotes?
+   (Feel free to list more than one for each category; extra comments
+   appreciated.)
+
+8. What sorts of comments worthy of preservation and ridicule did your
+   team members blurt out?  Do you have any comic stories worth
+   retelling?
+
+9. Do you have any other generic comments?
+
+Please send surveys to puzzle@mit.edu.
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..5a98a8974b31fa32adc6cfbae0274ec4e98c963f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/Puzzle.html
@@ -0,0 +1,61 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 2.10

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+2.10: Overanalysis

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Dorothy walks past 26-100 and can hear the large 5.11 lecture inside.

+For some reason she picks up this week's problem set.  She has a

+feeling it might be useful to her.

+

+  </i></blockquote>

+

+  <blockquote>

+

+A hydrocarbon was found to contain the following elements: hydrogen,

+carbon, bromine, chlorine, nitrogen, oxygen, and sulfur.  When 5.110

+grams of the compound were combusted in excess oxygen, the products

+were analyzed.  The analysis is summarized below.

+</blockquote>

+<blockquote>

+There was 88.01 mg of water collected.  The carbon dioxide was collected

+on solid calcium oxide, which forms calcium carbonate in the presence of 

+carbon dioxide. The calcium oxide originally weighed 345.520 g, but weighed 

+346.810 g after exposure to the carbon dioxide.  The nitrogen dioxide was

+collected at STP and occupied a volume of 766.49 mL.  The two

+halides were collected as a mixture of silver bromide and silver

+chloride weighing 8.5216 g after treatment with silver nitrate.  This

+mixture was then converted to silver chloride alone by treatment with

+excess hydrochloric acid.  The resulting silver chloride weighed

+7.0010 g.  The sulfur dioxide was collected and bubbled through water

+to produce a solution of sulfurous acid.  The solution of this acid

+was titrated with a solution of 0.1246 M sodium hydroxide until the

+acid was completely deprotonated.  The endpoint required 235.22 mL of

+the sodium hydroxide.  What is the empirical formula of the

+hydrocarbon?

+

+  </blockquote>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_10_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..48f6ea431eb36b413d4ec9730a0b156733b8a533
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/Puzzle.html
@@ -0,0 +1,25 @@
+<html>

+<head><title>Mystery Hunt 2000, Puzzle 2.1

+</title></head>

+<body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+2.1: Lions and Tigers and Bears!

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+  <blockquote><i>

+"These steam tunnels are so scary-- who knows what sorts of monsters

+might be hiding in them?"

+  </i></blockquote>

+

+<center>

+<img src="./grid.gif" width=551 height=551 alt="grid">

+</center>

+

+</body><script type="module" src="/checkanswer.js"></script>

+</html>

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_1_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..f9c6728eee1bfc27d1ea8933fe960d283d7fb63d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/Puzzle.html
@@ -0,0 +1,48 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 2.2

+

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+2.2: Atlas Shrugged

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+Dorothy and Toto paused in lobby 7. 

+"It's always much easier to know where one is going when one has a

+map," commented Dorothy.  

+

+

+  </i></blockquote>

+

+  <pre>

+

+<img alt="a.jpg" src="a.jpg"><p>

+<img alt="b.jpg" src="b.jpg"><p>

+<img alt="c.jpg" src="c.jpg"> <p>

+<img alt="d.jpg" src="d.jpg"><p>

+<img alt="e.jpg" src="e.jpg"><p>

+<img alt="f.jpg" src="f.jpg">

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_2_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..b94a8e45475325066a833b776c91ffc81eb2d324
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/Puzzle.html
@@ -0,0 +1,52 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 2.3

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+2.3: Everything Is Something

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+"What <b>are</b> these numbers?" Dorothy wondered aloud, staring at the

+crumpled paper she'd found on the floor in Building 2.  The slip read

+simply: 3, 11, 15, 27, 35. <p>

+

+"Maybe they're taxi numbers in Iceland," offered the Lion.<p>

+

+"Perhaps they're the numbers of the U.S. Presidents that were bald," 

+suggested the Tin Man.<p>

+

+"Have you asked around the math department?" asked the Scarecrow.<p>

+

+"They were no help," the girl replied.<p>

+

+"How about calling the Sloane School of Management?" <p>

+

+"Could they possibly be of any use?" she asked.<p>

+

+"You never know," said the Scarecrow.  "Once, I wrote to a guy at the Media

+Lab to help me with my English homework, and my grades were never better."

+<p>

+"Stop kidding around, you guys," interjected the Lion. "I think I've 

+got it: they're the leap years in the Druid calendar!"

+<p>

+Dorothy just grimaced.

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_3_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..295e2fbad0a3724356c5a5ca9ac6c38084bcf110
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/Puzzle.html
@@ -0,0 +1,114 @@
+ <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 2.4

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+2.4: Making Tracks

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+Wandering through building 14, Dorothy stopped abruptly. "Such odd music... it

+sounds so familiar! I wish I could place it..." <p>

+

+Along walked a helpful 

+munchkin. "Well, perhaps you'd like to hear it again!" He stomped on a floor 

+tile and music filled the hall again.<p>

+

+"But that's not the same music..."  Dorothy responded.<p>

+"Sure it is! Next you'll be telling me there aren't words 

+on that floor!" And sure enough, further down the hall was a floor tiling 

+covered in letters. <o>

+"Well, there seem to be words there, but I don't know 

+which ones I need..." <p>

+But the munchkin was gone.

+

+  </i></blockquote>

+

+<table>

+<tr>

+<td width=50> <A HREF="01.mp3">1</A>

+<td width=50> <A HREF="02.mp3">2</A>

+<td width=50> <A HREF="03.mp3">3</A>

+<td width=50> <A HREF="04.mp3">4</A>

+<td width=50> <A HREF="05.mp3">5</A>

+<td width=50> <A HREF="06.mp3">6</A>

+<td width=50> <A HREF="07.mp3">7</A>

+</tr>

+<tr>

+<td width=50> <A HREF="08.mp3">8</A>

+<td width=50> <A HREF="09.mp3">9</A>

+<td width=50> <A HREF="10.mp3">10</A>

+<td width=50> <A HREF="11.mp3">11</A>

+<td width=50> <A HREF="12.mp3">12</A>

+<td width=50> <A HREF="13.mp3">13</A>

+<td width=50> <A HREF="14.mp3">14</A>

+</tr>

+<tr>

+<td width=50> <A HREF="15.mp3">15</A>

+<td width=50> <A HREF="16.mp3">16</A>

+<td width=50> <A HREF="17.mp3">17</A>

+<td width=50> <A HREF="18.mp3">18</A>

+<td width=50> <A HREF="19.mp3">19</A>

+<td width=50> <A HREF="20.mp3">20</A>

+<td width=50> <A HREF="21.mp3">21</A>

+</tr>

+<tr>

+<td width=50> <A HREF="22.mp3">22</A>

+<td width=50> <A HREF="23.mp3">23</A>

+<td width=50> <A HREF="24.mp3">24</A>

+<td width=50> <A HREF="25.mp3">25</A>

+<td width=50> <A HREF="26.mp3">26</A>

+<td width=50> <A HREF="27.mp3">27</A>

+<td width=50> <A HREF="28.mp3">28</A>

+</tr>

+

+</table>

+<pre>

+OHAHORSEOFADIFFERENTCOLORPJO

+HGHOULISHBOMBSREGLOBYARRAYUN

+AHATOEACMEPUZZLESSETECTRUGDT

+HOTIICOWARDLYLIONSASTRONOMYH

+OUOIDTREATLAHRYEEHADOROTHYGE

+RLECTUREHUMWITCHVARKSPOPPYAE

+SIAORRNSATOCKLTEMUDTSAUKLHRD

+ESCWEESALITCRIOPLFRANKBAUMLG

+OHMAAHALLISIAHOPXTANGENTMQAE

+FBERTUTIILYAVTLOFFTOSEETSONY

+AOPDLMOTSYYPEFIRECTHEWIZARDS

+DMULAWCCIAPRNPNZMOFUNATMITUI

+IBZYHIKRAVENXCGMYSTERYACTIVE

+FSZLRTLIHTFPCAMUSICAITFDEALT

+FRLIYCTOOLINGMBHUNTESHUOCPOW

+EEEOEHEPPORZMUHWHEEENINYHJSO

+RGSNEVMLXFEMYSUHTRCETSSWNRTO

+ELSSHAUFTFCOSINERYHELMEOIAID

+NOEAARDRATTFTCTECHYEUIARCDNS

+TBTSDKTANOHUEAEEEEEACTRDODOM

+CYETOSSNGSENRISNTLUCKBCDLSZA

+OACRRPAKEEWAYTHISMITBFHDOTIN

+LRTOOOUBNEITAFUNSEARCHADRCOZ

+ORRNTPKATTZMCDOYWORDDDDDROPS

+RAUOHPLUMSAITECHNICOLORRSINE

+PYGMYYHMQORTIAPJRADDSTCOINON

+JUDYGARLANDUVLOSTINOZIOPNORD

+ONTHEEDGEYSIETWOODSMANZSENDS

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_4_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..2b2268d55c8e06a6ec92a4d739ca3c94d381d978
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/Puzzle.html
@@ -0,0 +1,46 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 2.5

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+2.5: The Blues

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+Dorothy passes by 4-132 and hears doleful, discordant strains

+emanating.  She goes in and sits entranced as an old bluesman finishes

+his cacophonous act.  She rushes up to the stage afterwards and thanks

+him effusively for the performance.  "I loved that last piece!  Was it

+an original?"  "Of course my dear," says the bluesman, handing her the

+sheet music.

+

+  </i></blockquote>

+

+  <pre>

+<center>

+<img alt="Blues.gif" src="Blues.gif">

+</center>

+

+

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_5_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..7ab41af4154aa6f04d797ff2fa4ce42a07262576
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/Puzzle.html
@@ -0,0 +1,51 @@
+<html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 2.6

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+2.6: Grown-up Group

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+<!-- Chris thought this blurb was too short.  weenor.  The W84 bit is

+a total red herring. -->

+

+Dorothy finds the following list of words on a scrap of paper outside

+building W84.

+

+  </i></blockquote>

+<br>

+   <blockquote>

+DRINK SHIRE <br>

+SANDY OLIN <br>

+ETON CREAM <br>

+ONT. PIANO <br>

+ATT DATE <br>

+RUDY SIN <br>

+ROBIN CELL <br>

+HAMLET LAUER <br>

+MICHAEL NOON <br>

+COUNTRY LOREN <br>

+GYMNOPEDIE ERIE <br>

+</blockquote>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_6_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..29ee2bc5c3b124e1661322c499d86f60e1005922
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/Puzzle.html
@@ -0,0 +1,65 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 2.7

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+2.7: Out of Sight, Out of Mind

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+Continuing her compulsive wandering, Dorothy descended carefully into the

+subbasement and through a set of double doors to find herself lost in darkness.

+"I'd better find a light switch," she thought. She felt along the wall to her

+right until she came across a series of strange protrusions. "This isn't a

+switch... I wonder what it could be?"

+

+  </i></blockquote>

+

+  <pre>

+

+Please show your work.

+

+3798 / 18 = QUARK

+74365 - 74364 = NOTCH

+5561 x 2 = FEET

+837 + 294 = BANANA

+666 + 745 = OVER

+3 x 1037 = BEHIND

+45 - 23 = DOG

+6794 - 5383 = VENTRICLE

+104 x 3 = HAT

+88896 / 8 = HANDED

+744 / 31 = OF THE LINE

+548 - 237 = BILLING

+71 x 3 = HEAVY

+12 + 121 = OUT IN THE COLD

+1708 / 14 = SPIN

+13063 - 942 = BRAIN

+101 + 10 = DOLLAR

+10000 - 9983 = IT ALL OFF

+12 + 199 = BRASS

+112 + 111 = WING

+11 x 101 = FIELD

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_7_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..87690a5ff878d4acd79d6079ff690fccd449cf26
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/Puzzle.html
@@ -0,0 +1,177 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 2.8

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+2.8: The Direct Approach

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+"These puzzles are too hard," thought Dorothy.  "I bet I can find the

+coin just by looking for it."  With that thought in mind, she resolved

+to go looking.  She kept a journal of her search.

+

+  </i></blockquote>

+

+<body>

+

+The griffin was a little scary, but I had faced lions and tigers and

+bears before.  Besides, its spinning toy nearby kept it from having a

+threatening demeanor.  I headed into the other whirligig and emerged

+on the edge of a forest.  This wasn't nearly as scary as the ones in

+Oz (and none of the trees accosted me).  It was still early, so I

+didn't stop to rest.  The climate must change quickly around here -- by

+the time I reached the other side of the forest, the trees were of a

+different type.  I paused at the border to admire the grad students'

+vehicles, though they didn't seem well suited to the weather.

+

+<p>A sight for sore eyes beckoned me on.  It was Glinda and her little

+sisters!  I asked them if they knew where the coin for the

+W.I.Z.A.R.D. was.  They said to continue on behind them since I wasn't

+out of the jungle yet.

+

+<p>Sigh... I thought I had come out of the forest, but now found more

+wildlife than ever.  Continuing through, I heard some hissing snakes

+off to one side, so climbed as fast as I could to get away from

+them. (We can't all have the courage of a lion!)  As I paused for

+breath, some strange magic beams hit me squarely in the face.  Still

+afraid, I dashed off to my left until I could go no farther.

+

+<p>I am definitely going to have to discuss this with my therapist.  I

+hope I don't run into anymore dead ends.  Stranded in a deserted

+corridor -- this will take years to work through.  I looked around,

+searching for something familiar.  Even my traipsing about Oz was

+better than this.  There was a yellow path, and with nothing to lose,

+I went part way up it.  Soon I had to decide between paths.  Being a

+good little girl, I went the way that wasn't forbidden.  I passed into

+what seemed like another world and had yet another choice to make.

+Grappling with my indecision, I blindly struck off to one side.  Was

+it the path less travelled?  I fear I shall never know.

+

+<p>I thought I might have stumbled back into the wilderness since I

+saw a modern zebra to my left.  I couldn't see the trees for the

+forest, so they must not be there and I kept going.  Following the

+dotted line seemed like a good route to take, but maybe this wasn't

+such a great idea -- I soon felt a chill, and wondered if this meant

+my search was getting cold.

+

+<p>By this point it was much later, so I stopped for a quick snack to

+eat.  While there, a car came for me; I told it to take me to the

+stars.  Sadly, it must have misunderstood.  I ended up near one of

+W.I.T.C.H.'s torture chambers, and snuck past as quietly as possible.

+I followed the arrows, but they only led me back to where my search

+began!  Clearly the coin wasn't here, so I would have to look

+elsewhere....

+

+

+<br>

+<br>

+<br>

+<br>

+<p>After pondering <i>my</i> predicament, I began to think about the

+whole universe and <i>its</i> predicaments.  As long as I was at MIT,

+I figured, perhaps I should find out how the world works.  Setting off

+to find an expert, I soon found where they were, but couldn't get in,

+and all this theory wasn't going to help me with finding the coin.

+Getting back on track, I decided to restart my quest.  I could see

+down a long hallway; it looked like a promising path.

+

+<p>At a four-way fork, I heard some voices.  They sounded all too

+familiar, and didn't tell me anything I didn't already know or offer

+advice about which way to continue.  Left didn't look promising, and

+neither did going up or down, so I took the rightmost path.  Looking

+out a window as I went by, I saw only boring buildings and snow, and

+didn't tarry.  A fierce woman soon confronted me.  She wasn't quite as

+scary as that witch from Oz, but I wasn't about to take any chances.

+Believe you me, I shaped up fast and changed my ways.

+

+<p>Twisting and turning, I followed my newly chosen path.  I saw some

+tracks that reminded me of tractors, which made me a little homesick

+for Kansas, but then recalled why Kansas sucked so much: those darn

+twisters that come out of nowhere.  I headed straight down a winding

+road to lower ground, just in case.

+

+<p>I turned to my left and walked down into a becolumned plaza.

+Seeing more of Glinda's sisters scattered about, I went out to them to

+ask them for directions, but they told that I had to backtrack.  "How

+far?" I asked them.  They said, "You'll know when to stop."  Starting

+back, I had gone up a short way and paused for breath.  There I saw

+some writing mentioning my old friend Tim, but couldn't understand the

+rest of it.  This must be the sign!  I headed that direction to see if

+he could help me with this search.

+

+<p>With each step I got colder and colder.  I spied a place to warm

+up, and maybe a coin could be made there!  But as I went nearer and

+warmed my hands, I realized <i>that</i> sort of forgery didn't take

+place here.

+

+<br>

+<br>

+<br>

+<br>

+<p>I tried to think of where else to look.  All of a sudden, a great

+gust of wind picked me up and carried me through the air!  Flashbacks

+to Oz gripped me, and I was frozen with terror!  Luckily, it dropped

+me not too far away, where I saw the source of the wind: a cave where

+it seemed to blow even worse inside than outside, if that were

+possible.

+

+<p>Keeping the cave to my left, I passed into a short canyon.  There

+must have been something valuable nearby, since there were mercenaries

+guarding the edge of the path.  I passed by four white columns, went

+under a bridge, and came to a road.  There, I decided to head to my

+left, in the direction of most of the traffic.

+

+<p>At the corner, there was a model of a little red house.  I felt better

+because its address started with my lucky number.  Lo and behold,

+behind it was a door that ended in my lucky number, too!  I went in,

+straightaway, and decided to warm up by climbing some stairs.

+

+<p>Up and up I climbed until I spied lightning through a window.  That

+didn't seem like a safe place to be, so I headed back down and left

+the stairs at the first place I could escape, and went in the

+direction that the arrows indicated.  I passed a small spring on my

+right, but didn't detour.

+

+<p>My continuing lack of success made me feel hosed and my morale

+tanked.  I didn't want to sink any further but I only had the energy

+to raise myself a couple of notches.  No sooner had I done so when all

+my gains were erased.  Rather than go any farther down than necessary,

+I walked on, knowing I was heading for greener pastures.  Passing

+through them, blue skies greeted me.

+

+<p>I felt a little lost, but soon noticed a sign.  Looking at it, I

+found it told me where I was, but not in any way that was useful to

+me, so I turned to my left and went on.  Luckily, I spied something I

+knew would help me!  The Yellow Brick Road, floating in the air up

+above.  Following it forward, I turned the corner... where it went

+into a wall, and I couldn't go any further.

+

+<br>

+<br>

+<br>

+<br>

+<p>Sigh... this adventure sure didn't help me with my T.O.O.L.-age.

+I'm just going to stick to trying to solve W.I.T.C.H.'s clues.  

+

+</body><script type="module" src="/checkanswer.js"></script>

+</html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_8_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..b5f92cc7791d31b9098ac98af3e846cfa25cde60
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/Puzzle.html
@@ -0,0 +1,185 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 2.9

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+2.9: Scavenger Hunt

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Everyone knows that W.I.Z.A.R.D. system administrators have to be

+plied with bribes before they'll help a user...

+</i>

+

+<p>Bring us 10 items described by the following list of adjectives.  Each

+of the items you bring to us must be described by 4 adjectives, one

+from each column.  You will not get credit for using an adjective more

+than once.  If we are satisfied that your objects meet our

+requirements, we'll give you a single clue.  

+</blockquote>

+

+<P>

+       

+<center>

+<TABLE BORDER CELLSPACING=1 CELLPADDING=7 WIDTH=590>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">emerald-colored</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">home-made</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">phosphorescent</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">rare</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">yellow</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">brick</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">outlandish</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">faddy</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">ruby red</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">soft</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">plastic</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">alive</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">platy</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">counterfeit</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">radiant</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">azoic</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">tie-dyed</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">mechanical</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">recycled</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">erotic</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">temperature sensitive</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">broken</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">art deco</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">metallic</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">infantile</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">aquatic</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">fuzzy</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">watery</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">outdated</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">delectable</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">amorphous</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">fluted</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">asymmetric</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">cerulean</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">enormous</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">foreign</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">plaid</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">tacky</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">quadripartite</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">battery-operated</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">rhombic</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">stoichiometric</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">minute</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">prismatic</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">concave</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">unwholesome</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">transparent</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">ribbed</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">sharp</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">classified</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">luxurious</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">variegated</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">oblique</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">xeric</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">certified</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">self-propelling</TD>

+</TR>

+<TR><TD WIDTH="27%" VALIGN="TOP">

+<P ALIGN="CENTER">bulbous</TD>

+<TD WIDTH="23%" VALIGN="TOP">

+<P ALIGN="CENTER">circular</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">fragrant</TD>

+<TD WIDTH="25%" VALIGN="TOP">

+<P ALIGN="CENTER">magnetic</TD>

+</TR>

+</TABLE>

+</center>

+

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..7e9c4e89322cba94f313b819353c15a517ac3298
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set2_9_Puzzle.html/index.html
@@ -0,0 +1,39 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 2</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 2</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<A HREF="10/Puzzle.html">Puzzle 10</A> <A HREF="10/Solution.html">Solution 10</A><BR>
+<BR>
+<A HREF="../hints/hint2.gif">Hint</A> <A HREF="../hints/solution2.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A HREF="../survey.txt">survey</A>.
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..ae963f52525b3e89edb76eea0c46e51944eca930
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/Puzzle.html
@@ -0,0 +1,111 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 3.9
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+3.9: You'll Understand
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+
+Strolling down a hallway of Building 8, Dorothy is overrun by a
+scientist carting a projectile down the hall.  As she darts aside, she
+notices the following numbers on the projectile's cart.
+
+  </i></blockquote>
+
+<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=590>
+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">7<SUP>X</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">6<SUP>Q</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">12<SUP>S</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">10<SUP>O</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">4<SUP>R</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">3<SUP>P</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+</TR>
+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+</TR>
+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">4<SUP>J</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">6<SUP>U</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">10<SUP>F</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">1<SUP>W</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">7<SUP>E</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+</TR>
+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">6<SUP>M</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">9<SUP>V</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">8<SUP>K</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">12<SUP>H</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">6<SUP>G</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">4<SUP>Z</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">7<SUP>B</SUP></FONT></TD>
+</TR>
+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">10<SUP>D</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">2<SUP>C</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">4<SUP>A</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">4<SUP>N</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+</TR>
+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">6<SUP>Y</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">11<SUP>I</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>
+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">7<SUP>T</SUP></FONT></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>
+</TR>
+</TABLE>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/Solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/Solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..da0f3b2526350182241049deaa7ec2b2b312aaaa
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/Solution.html
@@ -0,0 +1,65 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Set 3 Metapuzzle (Solution)
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+
+Set 3 Metapuzzle (Solution)
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+
+
+  <pre>
+Author: a group effort
+
+For this metapuzzle, solvers didn't need to rearrange their answers!
+Except for 3.5, each answer had the form of a woman's name with an
+extra letter attached to the beginning.  Puzzle 3.5 had a blank
+answer, and solvers were supposed to fill in this blank.
+
+  3.1  HBO
+  3.2  OCHER
+  3.3  USABLE
+  3.4  RALLY
+  3.5  _______
+  3.6  LEMMA
+  3.7  AROSE
+  3.8  SPAM
+  3.9  SLEIGH
+
+A common name from the Wizard of Oz with the same format as those
+other words is GLINDA.  Inserting GLINDA into the blank and looking at
+the initial letters gives you the word HOURGLASS.  Those are the
+usernames and passwords for this round.
+
+This metapuzzle was a group effort.  Someone had mentioned that GLINDA
+had this format and got us all brainstorming for other words.  We came
+up with JAVA, EPAULETTE, PUMA, and all sorts of other words before we
+had to settle on a password.  (Brian Tivol spotted UTERI, and there
+was much animated discussion over whether or not to include it,
+especially when its replacement USABLE was used as the "call our
+mothers" puzzle.)  As expected, we did get some improper backsolving
+guesses, such as LAVA and SKATE.
+
+(One team looked over the first few women's names they'd collected and
+decided that they all must be names of women who appeared in Playboy.
+They then began what they called "extensive research".)
+  </pre>
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/asset_index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/asset_index.html
new file mode 100644
index 0000000000000000000000000000000000000000..cd6706c9a8469395953765a4501261f794989bf5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/asset_index.html
@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>2000 Mystery Hunt · MIT Mystery Hunt / Puzzle Club</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400&family=Syncopate:wght@700&display=swap"
+      rel="stylesheet"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="/style.css" type="text/css" />
+    <meta
+      name="description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+    <meta property="og:image" content="/images/header-coin.png" />
+    <meta
+      property="og:description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+  </head>
+  <body>
+    <div id="header"></div>
+    <main id="main">
+
+<h1><a href="../huntsbyyear.html">Archives</a> / 2000 Mystery Hunt </h1>
+
+<h3>Description</h3>
+<p> The 2000 Mystery Hunt was based on <em>Wizard of Oz</em> and asked teams to help guide Dorothy back
+home using the Tornado-Operated Object Levitator (T.O.O.L.), which required a coin for its operation.</p>
+<p> The coin was found at 2:18am on Sunday by Paintttniap, in a planter outside 9-136.</p>
+
+<h3>Credits</h3>
+The 2000 Mystery Hunt was written by Roger Barkan, Jennifer Berk, Jamie Coffin, Jed Goldstone, Heather Handley, Ann Jones, Ray Jones, Dan Katz, Kiran Kedlaya, Rose Koch, Brian Litofsky, Christopher Long, Catherine Moore, Chris Morse (Captain), Darren Rigby, Dave Savitt, and Brian Tivol.
+
+<h3>The Hunt Introduction</h3>
+
+<p>Welcome to MH2K! (That's Mystery Hunt 2000 for those of you
+are acronymatically challenged.)  This year, your puzzle-solving
+skills are sorely needed in order to help our hero, Dorothy Gale,
+return to her monochromatic homeland.</p>
+
+<p>The Munchkin Information Processing Board (MIPB) has offered
+to help Dorothy get home through the use of their newly designed
+Tornado-Operated Object Levitator (T.O.O.L.) Unfortunately, as a
+consequence of inventive eccentricity, the T.O.O.L. can only be
+operated with a special coin, and nobody on MIPB can remember where
+they left it. Your goal is to recover this coin.</p>
+
+<p>Fortuitously, you have a powerful computer system to aid you
+in your search. MIPB possesses a highly advanced network
+affectionately known as the Wonderfully Intelligent Zenith of All
+Recovery Devices (W.I.Z.A.R.D.)  that should be able to scan the
+campus and trace the location of the coin.  However, Wendy the
+Insidiously Tyrannical Computer Hacker (W.I.T.C.H.) has installed a
+series of password blocks into W.I.Z.A.R.D. and no one knows how to
+access its higher functions.</p>
+
+<p>It is known that W.I.T.C.H. has a careless habit of inadvertently
+leaving clues to her passwords around the MIT campus. Rather than make
+you look for them, Dorothy has graciously volunteered to brave the
+wild jungles of MIT in search of W.I.T.C.H.'s trail of devious
+puzzles, taking a pocket W.I.Z.A.R.D. terminal with her that will
+automatically record her adventures and post them online.  Some of her
+adventures may bring her into contact with some familiar faces; it
+seems she's not the only one who had a recent run-in with a
+tornado....</p>
+
+<p>You, the remote solving team, must solve W.I.T.C.H.'s puzzles, and
+extract from them a username and password, which will grant you access
+to the appropriate puzzles to deduce the second username and password,
+and so forth. Stay in contact with MIPB regarding your progress; they
+are working together with you to discover the coin, and they'll be
+glad to TRY to help you if you have questions.</p>
+
+<p>Good luck, keep your wits about you, and remember: There's no
+place like hell.</p>
+
+<h3>The Hunt and Solutions (linked)</h3>
+<ul>
+  <li><a href="set1">Puzzle Set 1</a></li>
+  <li><a href="set2">Puzzle Set 2</a></li>
+	<li><a href="set3">Puzzle Set 3</a></li>
+	<li><a href="set4">Puzzle Set 4</a></li>
+	<li><a href="set5">Puzzle Set 5</a></li>
+  <li><a href="endgame.html">Endgame</a></li>
+</ul>
+
+<h3>Photos</h3>
+<p>The photos below were accompanied by the following announcement: <em>Insidious news! Bitter about the coin they lost last year, Carmen and her gang have caught up with Dorothy and are preparing to exact a cruel revenge. Film at 11. </em></p>
+
+<div class="photowithlabel">
+<img src="vilepics/dorothy.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothycarmen.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothydan.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothyvile.jpg" class="photoframe"><br><br>
+</div>
+
+    </main>
+    <div id="footer"></div>
+  </body>
+  <script type="module" src="/package.js"></script>
+  <script type="module" src="/Header.js"></script>
+  <script type="module" src="/Nav.js"></script>
+  <script type="module" src="/Title.js"></script>
+  <script type="module" src="/Toggle.js"></script>
+  <script type="module" src="/Footer.js"></script>
+  <script type="module" src="/main.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/hint3.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/hint3.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1e220d9a30e2cf49c02310b99b97c63959cea0bb
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/hint3.txt
@@ -0,0 +1,11 @@
+HINT 3
+
+hint:thin::trespass:
+    :parses::stint:
+    :man::scare:
+    :footed::red:
+    :Handel::third:
+    :Al Hirt::folder:
+    :redo::alfalfa:
+    :Romeo::model:
+    :birds::pink:
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..950a981e8c2f8b1027133b52587cb01e33129283
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/index.html
@@ -0,0 +1,40 @@
+<HTML>

+<HEAD>

+<TITLE>Mystery Hunt 2000, Set 3</TITLE>

+<LINK REV=owns HREF="mailto:puzzle@mit.edu">

+</HEAD>

+

+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"

+VLINK="#000000">

+

+

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<H3>Puzzles, Set 3</H3>

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../index.html">Back to hunt</a>

+  </td></tr></table>

+

+

+<BLOCKQUOTE>

+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>

+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>

+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>

+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>

+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>

+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>

+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>

+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>

+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>

+<BR>

+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>

+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>

+If you participated in the Hunt, please fill out the <A

+HREF="../survey.txt">survey</A>.

+

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/solution3.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/solution3.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3dcf8c33de08dd37ab4e14d21aad9c490d8b5481
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/solution3.txt
@@ -0,0 +1,19 @@
+HINT 3 Solution
+
+Author: Roger Barkan
+
+Fill in the word at the end of each line that completes the analogy.
+That word starts the analogy on the next line as well.
+
+      hint:thin::trespass:sparsest
+sparsest:parses::stint:tin
+        tin:man::scare:crow
+    crow:footed::red:handed
+  handed:Handel::third:thirl
+  thirl:Al Hirt::folder:alfredo
+   alfredo:redo::alfalfa:alfa
+     alfa:Romeo::model:T
+        T:birds::pink:LADIES
+
+Answer is LADIES
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/survey.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/survey.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bea6442560f03c93420e9ab12c218a57a0967fca
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3/survey.txt
@@ -0,0 +1,40 @@
+
+We hope you aren't tired of answering our questions, but there is one
+last set we'd like you to try out.  Your comments will help future
+Hunts from succumbing to our pitfalls and possibly give us a warm
+fuzzy feeling inside.  You can answer either as teams or individuals,
+as you see fit.
+
+1. What is your team's name?
+
+2. How many years has your team competed in the Mystery Hunt?  How
+   many full-time solvers and how many come-and-go solvers were on
+   your team?
+
+3. What are your overall impressions of this year's Hunt?
+
+4. Do you feel as if you'd want to return next year?
+
+5. Did you feel there were any administrative or logistical problems
+   this year that future organizers could be warned about?
+
+6. Is there a specific member of MIPB you'd like to send a message to?
+   Is there a specific puzzle whose creator you'd like to send a
+   message to?
+
+7. Which puzzles did you find to be...
+      ...the most enjoyable?
+      ...the least enjoyable?
+      ...(in)elegant?
+      ...(un)memorable?
+      ...conducive to silly quotes?
+   (Feel free to list more than one for each category; extra comments
+   appreciated.)
+
+8. What sorts of comments worthy of preservation and ridicule did your
+   team members blurt out?  Do you have any comic stories worth
+   retelling?
+
+9. Do you have any other generic comments?
+
+Please send surveys to puzzle@mit.edu.
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..0613732e284876a7439622b1f67c8435943c14bc
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/Puzzle.html
@@ -0,0 +1,91 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 3.1

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+3.1: Inner Tube

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+W.I.T.C.H. taunts Dorothy, "Don't get washed away like I did.  Just

+try to stay afloat in this puzzle."

+

+  </i></blockquote>

+

+<center>

+<img alt="grid" src="grid.jpg">

+</center>

+

+</FONT><B><FONT SIZE=3><P>Across </P>

+<P>&#9;1</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Talked about depressed straggler</P>

+<B><P>&#9;7</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>From the east, like Fleming</P>

+<B><P>&#9;10</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Container is placed upside down next to Arizona jewel</P>

+<B><P>&#9;11</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Big group is swell</P>

+<B><P>&#9;15</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Come from strip poker, top missing</P>

+<B><P>&#9;16</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Alcohol, primarily Coors and Guinness</P>

+<B><P>&#9;17</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Fire rages around Moscow's foremost physicist</P>

+<B><P>&#9;18</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Companies discharge Russian soldier</P>

+<B><P>&#9;21</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Computer's electronic brain is built around overthrowing traitor</P>

+<B><P>&#9;23</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Branch agent</P>

+<B><P>&#9;24</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Tiger heard gear-cutting tools</P>

+<B><P>&#9;25</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Southeastern Spanish for "This cares for"</P>

+<B><P>&#9;27</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Suffers from trimming claws</P>

+<B><P>&#9;28</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Respond and take the stage again?</P>

+<B><P>&#9;30</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Kemp is loser of primaries, by a thousand</P>

+<B><P>&#9;31</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Hebrew lives in house MIT evicted</P>

+<B><P>&#9;34</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>"Broken" debuts in disastrous fashion</P>

+<B><P>&#9;36</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Oh!  Boyfriend sounds like wind</P>

+<B><P>&#9;38</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Put a page in for each essay</P>

+<B><P>&#9;39</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Alien planet seen in retracted eyepiece of scuba gear</P>

+<B><P>&#9;41</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>False display of courage lacks commerical approval</P>

+<B><P>&#9;43</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Transcribes guitar music on bills</P>

+<B><P>&#9;45</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Layers of top-grade pastries returned</P>

+<B><P>&#9;46</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Girl fashions lies after episode begins</P>

+<B><P>&#9;47</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Passed writing implement in middle of street</P>

+<B><P>&#9;48</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Hidden assassin in Japan!</P>

+<B><P>&#9;49</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Maine, reluctant as first, relinquishes mode of transportation</P>

+</FONT><FONT FACE="MS Sans Serif"><P>&nbsp;</P>

+</FONT><B><FONT SIZE=3><P>Down </P>

+<P>&#9;2</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Possessor of gold and loot dies oddly</P>

+<B><P>&#9;3</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Working after a concert, blew off the end</P>

+<B><P>&#9;4</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Heat of battle lies on Mount Hood at the beginning</P>

+<B><P>&#9;5</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Verbose rambling is a front</P>

+<B><P>&#9;6</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Repeat performance is overheard on military unit</P>

+<B><P>&#9;7</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Experts hang ten left skins</P>

+<B><P>&#9;8</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Channel essences of Braun &amp; Freud</P>

+<B><P>&#9;9</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Once liked mix on jukebox</P>

+<B><P>&#9;12</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Principle is pretty good in its current state</P>

+<B><P>&#9;13</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Criticize second escape</P>

+<B><P>&#9;14</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>A failure, most of Ghana is brown country</P>

+<B><P>&#9;19</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Listened to someone on the phone rage</P>

+<B><P>&#9;20</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>I spoon out arsenic</P>

+<B><P>&#9;22</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Bird's home south of a lake</P>

+<B><P>&#9;23</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Stop!  Put train the other way</P>

+<B><P>&#9;26</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Reagent finally valued after it neutralized a solution</P>

+<B><P>&#9;29</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Covered in flame, Joan of Arc for one was more pure</P>

+<B><P>&#9;32</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Code designer or lead scientist overshadowed by author</P>

+<B><P>&#9;33</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Belief is inside those people</P>

+<B><P>&#9;35</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Date covered desperado's sheet with Mexican shawl</P>

+<B><P>&#9;37</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Physicist sounds like a tiresome person</P>

+<B><P>&#9;40</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Green light turns in front of Los Angeles nut</P>

+<B><P>&#9;42</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Recite conceited pointer</P>

+<B><P>&#9;44</B></FONT><FONT FACE="MS Sans Serif">&#9;</FONT><FONT SIZE=3>Final interview involves sporting legend</P></DIR>

+</FONT>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_1_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..a98219cb1e0431957d64cc0254e74932824d2e97
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/Puzzle.html
@@ -0,0 +1,122 @@
+<html>

+<head><title>Mystery Hunt 2000, Puzzle 3.2</title></head>

+<body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+3.2: Numbers Upon Numbers

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+  <blockquote><i>

+

+Strangers kept surrounding Dorothy, mumbling cryptic strings of

+numbers...<p> "I'll see you in ten-two-fifty for five-eleven at

+one?"<p> "No, I have to drop by two-one-oh-eight by two to drop

+eighteen-one-hundred."<p> "Meet you in six-one-twenty for

+eight-oh-one-two, then?"<p> "In five.  In six-one-twenty."

+

+  </i></blockquote>

+

+Below is a list of clues describing twenty-five strictly increasing

+three-digit numbers, between 001 and 999, inclusive.  You will be able

+to place each number in the grid below based on its digits; although

+it might not be exactly clear in the middle, by the end there will be

+no ambiguities or empty cells.  As an example, W has been placed for

+you.

+

+<pre>

+     A: One-third of I

+     B: Just some number

+     C: A prime number

+     D: The average of A, B, and M

+     E: The sum of A and X, less T

+     F: Another prime number

+     G: The difference of Q and D

+     H: The average of C, K, and M

+     I: Thrice A                  

+     J: The average of D and O

+     K: The average of B and T

+     L: The average of A and V

+     M: The average of F and P                                  

+     N: Twice D               

+     O: The sum of D and E                                      

+     P: Another pesky number  

+     Q: A square number                                         

+     R: Yet another prime number

+     S: The average of H and X

+     T: The sum of F and G

+     U: The sum of C and N

+     V: The sum of F and K

+     W: Six hundred fifty-six

+     X: The sum of B, E, and I

+     Y: The sum of A, G, and L

+</pre>

+

+<center>

+<table border=3 width=75% bgcolor=white>

+

+<tr>

+<td>

+<td>

+<td>

+<th colspan=3 bgcolor=olive align=center valign=center>

+<font color=white><bold>6</bold></font>

+<th colspan=3 bgcolor=olive align=center valign=center>

+<font color=white><bold>7</bold></font>

+<th colspan=3 bgcolor=olive align=center valign=center>

+<font color=white><bold>8</bold></font>

+<th colspan=3 bgcolor=olive align=center valign=center>

+<font color=white><bold>9</bold></font>

+<th colspan=3 bgcolor=olive align=center valign=center>

+<font color=white><bold>0</bold></font>

+</tr>

+

+<tr>

+<th colspan=3 bgcolor=black align=center valign=center>

+<font color=white><bold>1</bold></font>

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp;

+</tr>

+

+<tr>

+<th colspan=3 bgcolor=black align=center valign=center>

+<font color=white><bold>2</bold></font>

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp;

+</tr>

+

+<tr>

+<th colspan=3 bgcolor=black align=center valign=center>

+<font color=white><bold>3</bold></font>

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp;

+</tr>

+<tr>

+<th colspan=3 bgcolor=black align=center valign=center>

+<font color=white><bold>4</bold></font>

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp;

+</tr>

+

+<tr>

+<th colspan=3 bgcolor=black align=center valign=center>

+<font color=white><bold>5</bold></font>

+<td align=center><b><font color=olive>6</font></b>

+<td align=center><b><font color=black>5</font></b>

+<td align=center><b><font color=olive>6</font></b>

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+<td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp; <td>&nbsp;

+</tr>

+

+</table>

+</center>

+

+</body><script type="module" src="/checkanswer.js"></script>

+</html>

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_2_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..d1f8010c798f2d51dab720cc77c998f033fea636
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/Puzzle.html
@@ -0,0 +1,47 @@
+<html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 3.3

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+3.3 Mothers Know Best

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+Dorothy and the Tin Man passed by a "DEF TUV TUV OPER OPER" poster

+as they walked down the Infinite Corridor. "Tin Man, who do you talk to when

+that heart of yours needs some advice?" <P>

+

+"Why, my mother, of course! Trouble is, she hasn't gotten her heart

+yet; she's been on the transplant list for years. But nonetheless, she

+somehow manages to have all the answers." The Tin Man paused for a

+moment, then added, "That is, unless I call her before 10 a.m. or

+after 10 p.m. (her time).  In that case she won't even pick up the

+phone. Does your mother do that?" <P>

+

+"Tin Man, you know I'm an orphan!"<P>

+

+"Oh right. Sorry. Well, you could always call one of MIPB's

+mothers.  I'm sure they wouldn't mind."<P>

+

+  </i></blockquote>

+<br>

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_3_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..fe34f5619c388087ed85aed6f77d6799e37cbdf9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/Puzzle.html
@@ -0,0 +1,84 @@
+<html>

+<head><title>Mystery Hunt 2000, Puzzle 3.4</title></head>

+<body bgcolor=black text=white link=silver alink=silver vlink=silver>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+3.4: Dorothy Finds Building 66

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+<blockquote><i>

+"I don't care how much you like playing that silly little card game;

+all I said was that I was looking for an expert at Magic to help send

+me home."

+</i></blockquote>

+

+Quite a strange game of Magic it was, too, since the players were

+experimenting in constructing their decks out of cards from other

+games.  The players had each initially revealed three cards before

+Dorothy interrupted them, and although they can remember their hands,

+they can't remember what order they were sitting in around the table.

+<br>

+<br>

+<br>

+

+<center>

+<table border=0>

+

+<tr valign=middle>

+<th>Nathan

+<td nowrap>

+<img align=middle src=Card30.gif>

+<img align=middle src=Card8.gif>

+<img align=middle src=Card12.gif>

+

+<tr valign=middle>

+<th>Reiner

+<td nowrap>

+<img align=middle src=Card9.gif>

+<img align=middle src=Card6.gif>

+<img align=middle src=Card15.gif>

+

+<tr valign=middle>

+<th>Eric

+<td nowrap>

+<img align=middle src=Card22.gif>

+<img align=middle src=Card45.gif>

+<img align=middle src=Card24.gif>

+

+<tr valign=middle>

+<th>Hans

+<td nowrap>

+<img align=middle src=Card7.gif>

+<img align=middle src=Card20.gif>

+<img align=middle src=Card13.gif>

+

+<tr valign=middle>

+<th>Gary

+<td nowrap>

+<img align=middle src=Card2.gif>

+<img align=middle src=Card1.gif>

+<img align=middle src=Card23.gif>

+

+<tr valign=middle>

+<th>Ivan

+<td nowrap>

+<img align=middle src=Card14.gif>

+<img align=middle src=Card11.gif>

+<img align=middle src=Card21.gif>

+

+<tr valign=middle>

+<th>Richard

+<td nowrap>

+<img align=middle src=Card5.gif>

+<img align=middle src=Card4.gif>

+<img align=middle src=Card10.gif>

+

+</table>

+</center>

+

+</body><script type="module" src="/checkanswer.js"></script>

+</html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_4_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..e2f579bcfff6beee308cdd60bfdc8ec3cffd4ea4
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/Puzzle.html
@@ -0,0 +1,76 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 3.5

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+3.5: Facial Expression

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+"I've met so many wonderful people on my journey, I hope I don't forget any

+of them!" thought Dorothy.  Just to be sure, she decided to make a list,

+doodling everyone she could remember.  Luckily she has an amazing memory

+for faces.  "How could I not?  Some of these people left such a first

+impression, I'm quite sure it will last me right through the rest of my life!"

+

+  </i></blockquote>

+

+ 

+<BODY LINK="#0000ff" VLINK="#800080">

+

+<FONT SIZE=5><P ALIGN="CENTER"><IMG SRC="Image1.jpg"></P>

+<P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image2.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image3.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image4.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image5.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image6.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image7.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image8.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image9.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image10.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image11.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image12.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image13.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">+</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image14.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image15.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image16.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">-</P>

+</FONT><P ALIGN="CENTER"><IMG SRC="Image17.jpg"></P>

+<FONT SIZE=5><P ALIGN="CENTER">=</P>

+</FONT><FONT SIZE=7><P ALIGN="CENTER">?</P></FONT></BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

+

+

+ 

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_5_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..9893cee6e423c3882c86e5949b0ba5d9a9d09e59
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/Puzzle.html
@@ -0,0 +1,38 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 3.6

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+3.6: Gearbox

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+Dorothy and the Scarecrow stood in front of the mysterious contraption

+in the basement of Building 54. "How do you think it works?" asked

+Dorothy.<p>

+"Beats me. I wonder who we can ask to find out."

+

+

+  </i></blockquote>

+

+<center>

+<img alt="Gearbox.jpg" src="Gearbox.jpg">

+</center>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_6_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..4f9a3cf5710b645bbd2b62d52bd7283c2942f62e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/Puzzle.html
@@ -0,0 +1,72 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 3.7

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+3.7: Pleasures of Poetry

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+Dorothy noticed a sign as she walked down the corridor:<p>

+</i> 

+ <b>

+Please pick up a copy of the reading for Pleasures of Poetry for

+Saturday, January 15.

+</b><p>

+<i>

+"Another IAP activity I don't have time for," she sighed, "but let's have 

+a look in any case."<p>

+

+She reached into the envelope on the floor, lifted out a sheet, and

+began reading. "They call this poetry?! This is almost as bad as

+that doggerel the Tin Woodsman showed me last Valentine's Day."<br>

+ </i></blockquote>

+<HR>

+Post hunt addendum - At the usual location for Pleasures of

+Poetry handouts were copies of the poem:<BR>

+

+<PRE>

+Leah G. Troody (1967-)

+

+THE HUNTER'S SONG

+

+As a purplish shade to a donor to Yale,

+Or a vessel off ground to a common relation,

+A worker ill paid to an age large in scale,

+Or an aspect of sound to a marked aspiration;

+As these things relate, so does what this is not

+To a key piece of data which seems to be sought!

+

+

+

+

+Pleasures of Poetry, Prof. Marty Conostese, January 15

+</PRE>

+

+

+ 

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

+

+

+

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_7_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..33607ff4bf1ee05f8b4e38f4218126222feba927
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/Puzzle.html
@@ -0,0 +1,77 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 3.8

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+3.8: Fresh Meat

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Walking up and down the infinite corridor, Dorothy passed a lot of

+familiar faces.

+

+"Gee, I guess all the boys at MIT are a lot cuter than I had heard,"

+said Dorothy.

+

+  </i></blockquote>

+

+<table border=0>

+<tr>

+<td><A href="1.jpg">1</A>

+<td><A href="2.jpg">2</A>

+<td><A href="3.jpg">3</A>

+<td><A href="4.jpg">4</A>

+<td><A href="5.jpg">5</A>

+<tr>

+<td><A href="6.jpg">6</A>

+<td><A href="7.jpg">7</A>

+<td><A href="8.jpg">8</A>

+<td><A href="9.jpg">9</A>

+<td><A href="10.jpg">10</A>

+<tr>

+<td><A href="11.jpg">11</A>

+<td><A href="12.jpg">12</A>

+<td><A href="13.jpg">13</A>

+<td><A href="14.jpg">14</A>

+<td><A href="15.jpg">15</A>

+<tr>

+<td><A href="16.jpg">16</A>

+<td><A href="17.jpg">17</A>

+<td><A href="18.jpg">18</A>

+<td><A href="19.jpg">19</A>

+<td><A href="20.jpg">20</A>

+<tr>

+<td><A href="21.jpg">21</A>

+<td><A href="22.jpg">22</A>

+<td><A href="23.jpg">23</A>

+<td><A href="24.jpg">24</A>

+<td><A href="25.jpg">25</A>

+<tr>

+<td><A href="26.jpg">26</A>

+</table>

+</BODY><script type="module" src="/checkanswer.js"></script></HTML>

+

+

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_8_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..0bd2ead46d2cd2e400edf03bdc064b0f638fa401
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/Puzzle.html
@@ -0,0 +1,111 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 3.9

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+3.9: You'll Understand

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Strolling down a hallway of Building 8, Dorothy is overrun by a

+scientist carting a projectile down the hall.  As she darts aside, she

+notices the following numbers on the projectile's cart.

+

+  </i></blockquote>

+

+<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=590>

+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">7<SUP>X</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">6<SUP>Q</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">12<SUP>S</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">10<SUP>O</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">4<SUP>R</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">3<SUP>P</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+</TR>

+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+</TR>

+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">4<SUP>J</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">6<SUP>U</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">10<SUP>F</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">1<SUP>W</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">7<SUP>E</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+</TR>

+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">6<SUP>M</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">9<SUP>V</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">8<SUP>K</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">12<SUP>H</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">6<SUP>G</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">4<SUP>Z</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">7<SUP>B</SUP></FONT></TD>

+</TR>

+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">10<SUP>D</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#800000"><P ALIGN="CENTER">2<SUP>C</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#00ff00"><P ALIGN="CENTER">4<SUP>A</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">4<SUP>N</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+</TR>

+<TR><TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">6<SUP>Y</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#008000"><P ALIGN="CENTER">11<SUP>I</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66>

+<FONT SIZE=6 COLOR="#ff0000"><P ALIGN="CENTER">7<SUP>T</SUP></FONT></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+<TD WIDTH="14%" VALIGN="TOP" HEIGHT=66><P></P></TD>

+</TR>

+</TABLE>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..bc2b981a3f993a92807bad89c4df9a98ee29c513
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set3_9_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 3</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 3</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<A HREF="9/Puzzle.html">Puzzle 9</A> <A HREF="9/Solution.html">Solution 9</A><BR>
+<BR>
+<A HREF="../hints/hint3.txt">Hint</A> <A HREF="../hints/solution3.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR></BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..42bf4c035b9cdd450c5735fbdfdb22097cafcf75
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Puzzle.html
@@ -0,0 +1,66 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 4.8
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+4.8 Invincible
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+
+<P>"Where is everyone going?" asked Dorothy.
+
+<P>"To the Castle, to watch the Master play," said a passerby.  "He's
+never lost there, you know.  Would you like to go, too?"
+
+<P>"I might as well.  I don't know where else I would go.  I'm so lost."
+
+<P>Dorothy followed the stranger, until they came to a guard.  "Before
+you can go on," he said, "you must give me your name and password."
+
+<P>"I'll vouch for her.  My name is TimHunt and my password is IHTFP.
+Can we go, now?"
+
+<P>"Go ahead," said the guard, and they passed through the gate.
+
+<P>"Oooh, Othello!" exclaimed Dorothy.  "What?!" she asked, as Tim gave
+her a look that could have curdled milk.
+
+  </i></blockquote>
+
+  <pre>
+      R18 P18 H13 F13 _11
+      H12 K8  R2  F15 _15
+      H11 O13 Q13 G11 _14
+      P13 N10 S11 S12 _11
+      G14 G15 J15 F12 _17
+      E19 E1  F1  D1  ___
+      Q3  R3  S13 S12 _14
+      J19 G19 J18 P7  _6 
+      B10 C9  A9  B3  _7 
+      K6  J6  K8  J7  _8 
+      Q12 N10 R10 J14 _15
+      J14 N12 K16 L16 _13
+      P10 R9  Q10 O5  _6 
+      Q18 G17 F17 D18 _9 
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Puzzle_easy.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Puzzle_easy.html
new file mode 100644
index 0000000000000000000000000000000000000000..25a80b1d673b02812c16094bff695d15f1133969
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Puzzle_easy.html
@@ -0,0 +1,66 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 4.8
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+4.8 Invincible
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+
+<P>"Where is everyone going?" asked Dorothy.
+
+<P>"To the Castle, to watch the Master play," said a passerby.  "He's
+never lost there, you know.  Would you like to go, too?"
+
+<P>"I might as well.  I don't know where else I would go.  I'm so lost."
+
+<P>Dorothy followed the stranger, until they came to a guard.  "Before
+you can go on," he said, "you must give me your name and password."
+
+<P>"I'll vouch for her.  My name is TimHunt and my password is IHTFP.
+Can we go, now?"
+
+<P>"Go ahead," said the guard, and they passed through the gate.
+
+<P>"Oooh, Othello!" exclaimed Dorothy.  "What?!" she asked, as Tim gave
+her a look that could have curdled milk.
+
+  </i></blockquote>
+
+  <pre>
+      R18 P18 H13 F13 _11  1857
+      H12 K8  R2  F15 _15  1857
+      H11 O13 Q13 G11 _14  1849
+      P13 N10 S11 S12 _11  1857
+      G14 G15 J15 F12 _17  1861
+      E19 E1  F1  D1  ___  1859
+      Q3  R3  S13 S12 _14  1852
+      J19 G19 J18 P7  _6   1853
+      B10 C9  A9  B3  _7   1852
+      K6  J6  K8  J7  _8   1860
+      Q12 N10 R10 J14 _15  1849
+      J14 N12 K16 L16 _13  1859
+      P10 R9  Q10 O5  _6   1854
+      Q18 G17 F17 D18 _9   1861
+
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..4489b4a83ae6fb4c02ef02a97bb44b1ccaab8490
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/Solution.html
@@ -0,0 +1,50 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Set 4 Metapuzzle (Solution)
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+
+Set 4 Metapuzzle (Solution)
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+
+
+  <pre>
+Author: Roger Barkan
+
+4.7   FAHRENHEIT (1986)
+4.1   ISOLATION (1984)
+4.6   TURN BACK (1980)
+4.3   HYDRA (1979)
+
+are albums by the rock band TOTO.
+
+4.8   BENT OUT OF SHAPE (1983)
+4.4   DOWN TO EARTH (1979)
+4.5   ON STAGE (1977)
+4.2   RISING (1976)
+
+are albums by the rock band RAINBOW (sometimes referred to as Ritchie
+Blackmore's Rainbow).
+
+The username is TOTO and the password is RAINBOW.
+
+  </pre>
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/asset_index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/asset_index.html
new file mode 100644
index 0000000000000000000000000000000000000000..cd6706c9a8469395953765a4501261f794989bf5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/asset_index.html
@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>2000 Mystery Hunt · MIT Mystery Hunt / Puzzle Club</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400&family=Syncopate:wght@700&display=swap"
+      rel="stylesheet"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="/style.css" type="text/css" />
+    <meta
+      name="description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+    <meta property="og:image" content="/images/header-coin.png" />
+    <meta
+      property="og:description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+  </head>
+  <body>
+    <div id="header"></div>
+    <main id="main">
+
+<h1><a href="../huntsbyyear.html">Archives</a> / 2000 Mystery Hunt </h1>
+
+<h3>Description</h3>
+<p> The 2000 Mystery Hunt was based on <em>Wizard of Oz</em> and asked teams to help guide Dorothy back
+home using the Tornado-Operated Object Levitator (T.O.O.L.), which required a coin for its operation.</p>
+<p> The coin was found at 2:18am on Sunday by Paintttniap, in a planter outside 9-136.</p>
+
+<h3>Credits</h3>
+The 2000 Mystery Hunt was written by Roger Barkan, Jennifer Berk, Jamie Coffin, Jed Goldstone, Heather Handley, Ann Jones, Ray Jones, Dan Katz, Kiran Kedlaya, Rose Koch, Brian Litofsky, Christopher Long, Catherine Moore, Chris Morse (Captain), Darren Rigby, Dave Savitt, and Brian Tivol.
+
+<h3>The Hunt Introduction</h3>
+
+<p>Welcome to MH2K! (That's Mystery Hunt 2000 for those of you
+are acronymatically challenged.)  This year, your puzzle-solving
+skills are sorely needed in order to help our hero, Dorothy Gale,
+return to her monochromatic homeland.</p>
+
+<p>The Munchkin Information Processing Board (MIPB) has offered
+to help Dorothy get home through the use of their newly designed
+Tornado-Operated Object Levitator (T.O.O.L.) Unfortunately, as a
+consequence of inventive eccentricity, the T.O.O.L. can only be
+operated with a special coin, and nobody on MIPB can remember where
+they left it. Your goal is to recover this coin.</p>
+
+<p>Fortuitously, you have a powerful computer system to aid you
+in your search. MIPB possesses a highly advanced network
+affectionately known as the Wonderfully Intelligent Zenith of All
+Recovery Devices (W.I.Z.A.R.D.)  that should be able to scan the
+campus and trace the location of the coin.  However, Wendy the
+Insidiously Tyrannical Computer Hacker (W.I.T.C.H.) has installed a
+series of password blocks into W.I.Z.A.R.D. and no one knows how to
+access its higher functions.</p>
+
+<p>It is known that W.I.T.C.H. has a careless habit of inadvertently
+leaving clues to her passwords around the MIT campus. Rather than make
+you look for them, Dorothy has graciously volunteered to brave the
+wild jungles of MIT in search of W.I.T.C.H.'s trail of devious
+puzzles, taking a pocket W.I.Z.A.R.D. terminal with her that will
+automatically record her adventures and post them online.  Some of her
+adventures may bring her into contact with some familiar faces; it
+seems she's not the only one who had a recent run-in with a
+tornado....</p>
+
+<p>You, the remote solving team, must solve W.I.T.C.H.'s puzzles, and
+extract from them a username and password, which will grant you access
+to the appropriate puzzles to deduce the second username and password,
+and so forth. Stay in contact with MIPB regarding your progress; they
+are working together with you to discover the coin, and they'll be
+glad to TRY to help you if you have questions.</p>
+
+<p>Good luck, keep your wits about you, and remember: There's no
+place like hell.</p>
+
+<h3>The Hunt and Solutions (linked)</h3>
+<ul>
+  <li><a href="set1">Puzzle Set 1</a></li>
+  <li><a href="set2">Puzzle Set 2</a></li>
+	<li><a href="set3">Puzzle Set 3</a></li>
+	<li><a href="set4">Puzzle Set 4</a></li>
+	<li><a href="set5">Puzzle Set 5</a></li>
+  <li><a href="endgame.html">Endgame</a></li>
+</ul>
+
+<h3>Photos</h3>
+<p>The photos below were accompanied by the following announcement: <em>Insidious news! Bitter about the coin they lost last year, Carmen and her gang have caught up with Dorothy and are preparing to exact a cruel revenge. Film at 11. </em></p>
+
+<div class="photowithlabel">
+<img src="vilepics/dorothy.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothycarmen.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothydan.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothyvile.jpg" class="photoframe"><br><br>
+</div>
+
+    </main>
+    <div id="footer"></div>
+  </body>
+  <script type="module" src="/package.js"></script>
+  <script type="module" src="/Header.js"></script>
+  <script type="module" src="/Nav.js"></script>
+  <script type="module" src="/Title.js"></script>
+  <script type="module" src="/Toggle.js"></script>
+  <script type="module" src="/Footer.js"></script>
+  <script type="module" src="/main.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/hint4.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/hint4.txt
new file mode 100644
index 0000000000000000000000000000000000000000..57709ce55b6c41b9c2863260f89a850fb15af4f9
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/hint4.txt
@@ -0,0 +1,9 @@
+HINT 4
+
+City Point - Otis and Summer
+Ashmont - Andrew
+Kane - Ruggles
+Ashmont - Forest Hills
+Forest Hills - Andrew
+Fields Corner - Ruggles
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..9fa2f95f3acd25b55bfb8ff7fba535fc2981096f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/index.html
@@ -0,0 +1,41 @@
+<HTML>

+<HEAD>

+<TITLE>Mystery Hunt 2000, Set 4</TITLE>

+<LINK REV=owns HREF="mailto:puzzle@mit.edu">

+</HEAD>

+

+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"

+VLINK="#000000">

+

+

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<H3>Puzzles, Set 4</H3>

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../index.html">Back to hunt</a>

+  </td></tr></table>

+

+

+<BLOCKQUOTE>

+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>

+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>

+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>

+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>

+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>

+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>

+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>

+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8

+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>

+<BR>

+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>

+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>

+</BLOCKQUOTE>

+If you participated in the Hunt, please fill out the <A

+HREF="../survey.txt">survey</A>.

+

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/solution4.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/solution4.txt
new file mode 100644
index 0000000000000000000000000000000000000000..52d5069d8713f735d1f0c06dc0ddb19166b0e778
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/solution4.txt
@@ -0,0 +1,8 @@
+HINT 4 Solution
+
+Author: Kiran Kedlaya
+
+Each row consists of the endpoints of a Boston bus line.  The numbers
+of these lines (which can be found at www.mbta.com) are 7, 18, 15, 21,
+16, 19.  Translating these into letters (with A = 1, etc.) yields the
+clue GROUPS.
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/survey.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/survey.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bea6442560f03c93420e9ab12c218a57a0967fca
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4/survey.txt
@@ -0,0 +1,40 @@
+
+We hope you aren't tired of answering our questions, but there is one
+last set we'd like you to try out.  Your comments will help future
+Hunts from succumbing to our pitfalls and possibly give us a warm
+fuzzy feeling inside.  You can answer either as teams or individuals,
+as you see fit.
+
+1. What is your team's name?
+
+2. How many years has your team competed in the Mystery Hunt?  How
+   many full-time solvers and how many come-and-go solvers were on
+   your team?
+
+3. What are your overall impressions of this year's Hunt?
+
+4. Do you feel as if you'd want to return next year?
+
+5. Did you feel there were any administrative or logistical problems
+   this year that future organizers could be warned about?
+
+6. Is there a specific member of MIPB you'd like to send a message to?
+   Is there a specific puzzle whose creator you'd like to send a
+   message to?
+
+7. Which puzzles did you find to be...
+      ...the most enjoyable?
+      ...the least enjoyable?
+      ...(in)elegant?
+      ...(un)memorable?
+      ...conducive to silly quotes?
+   (Feel free to list more than one for each category; extra comments
+   appreciated.)
+
+8. What sorts of comments worthy of preservation and ridicule did your
+   team members blurt out?  Do you have any comic stories worth
+   retelling?
+
+9. Do you have any other generic comments?
+
+Please send surveys to puzzle@mit.edu.
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..fed1f28849363809b65bfda7887f9d3910ce94db
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/Puzzle.html
@@ -0,0 +1,96 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.1

+

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+4.1 An Exercise In Futility

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+Wishing to leave this strange godforesaken place, Dorothy walked down

+into a tunnel where she was told there was some form of public

+transport. She stared at the tracks for a long time, but there was only 

+silence, and no train came to whisk her away. Finally, a man in uniform 

+appeared and said, "I'm sorry, ma'am, the T doesn't run today. We resume 

+regular service again tomorrow morning." And then he disappeared as 

+mysteriously as he had come...

+ </i></blockquote>

+

+<blockquote>

+the reasons it works are that six cold labors in the outside which the

+what kinds the running resume more but is skull many if and Steinweg

+less lost the skating the but unknown can since Feckham in is the

+flying reasons are the the tell of Given unknown dearly tennis winter

+Cunard skull and it seas time crowned of strides abode in Peterman

+beard of on short ounce but no death and all abode by spite of but

+divine for Testew of the is with and Bishop alas can large reasons in

+tennis the man good unknown that existence much away air unfinished

+Essy-in-Possy unfinished fading is of a as deny of in alas Cunard

+Steinweg it blue what sea earth doubt concurrently winter in sea

+namely a a of the tennis of the abandoned the is I unknown spite that

+light simultaneously for nine will the concurrently great plunged then

+athambia I reasons Possy in to gliding and Acacacacademy the skull

+calm that resume over alas with holes all Wattmann physical left in a

+that for great wastes skull the a as is spite and decimal summer

+alimentation a of some strides the of result is Berkeley resume in

+measure time the public of is in to head in man Testew I divine of is

+established tennis calm the much spite God time the earth the the what

+whose that is swimming to doubt blast the unknown it per Cunard word

+by culture clings so pines in Puncher Clapham of sorts Peterman who

+Connemara Clapham there Miranda of stones spite of the firmament

+sports extension what is cycling camogie the in labors reasons the

+light time floating on of in who labors unfinished of still result as

+the with simultaneously tennis skull in nothing is not running

+Connemara are left Fartov skull a what to such of tennis will result

+and hockey labors of Anthropopopometry the a the facts conating tell

+word and the Cunard with brief Cunard the and which I approximately

+the all in in fire other resume reasons who apathia I short Testew I

+tune on that in deeps Peckham air heaven Fulham skull considering

+loves still left concurrently fading in loss but stones flames

+unfinished on tennis gliding facts Lord and I of the and great

+established year word more but tears public more flying flying

+hereinafter the grave on inch unknown heights the fire beyond nearest

+those and of the the will not what word pines in for and earth in more

+grave that the the doubt that on autumn of succedanea man for

+mountains like as and for appears reasons the continues rivers skull

+of light Essy Wattmann resume stark in on alas spite and tell from

+simultaneously Cunard cold their fine what of being for beyond the the

+unknown labors it the and to great calm practice unknown what divine

+the will in unknown of better water and in alas one for all unfinished

+the so in personal the the doubt on same the plains labors defecation

+blue stones per cold matter earth established of considering tell

+sorts for and tennis of without fades flames of men so in of tennis

+alas in of head earth the of running plunged us figures calm than for

+all fast air a doubt abode in unknown more eighteen land namely more

+of reasons riding in isolation Connemara beard the reasons alas

+football light so so reasons the quaquaquaqua that in stones it and

+Puncher fire white of feet aphasia the and the the round there of alas

+of unfinished fire quaquaquaqua forth dead sports and resume lost all

+stones all the that works so more then and abandoned more and uttered

+matter the of so kinds Fulham so wastes dark air the more fast by it

+in alas of four of stockinged and man stones time labors and fast in

+than something graver air golf but will or stones as the sorts and of

+calm exceptions unfinished the resume and fading even hell word the

+Belcher the by on penicilline a is of left suffers though the the the

+on established that great intermittent hundred in dying Testew in

+naked say in all who that the abode the the divine torment that view

+as not

+</blockquote>

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_1_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..c86bb8c93af4ddfa13bb6ee0fd93f132695d4920
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/Puzzle.html
@@ -0,0 +1,68 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.2

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+4.2: Triple Feature

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+"Going to LSC this Sunday, Dorothy?" asked the Scarecrow.  "I totally

+want to see the second movie, but I'd never heard of the first or

+third."<p>

+

+"Third?" said Dorothy, confused.  "LSC's only showing two movies on

+Sunday, silly.  And they both rock!"

+

+  </i></blockquote>

+

+a movie in theaters now, a classic western, a recent western, a space

+opera, a space horror film, a classic slasher, a Viking slasher, a

+tale of an amnesiac, a tale of a frozen pilot, a tale of a socialite,

+a tale of a rock star, a tale of an opera singer, an adaptation of an

+old comic book, an adaptation of a newer comic book, a Shakespearean

+play, a historical drama, a WWII action film, a Disney movie, a good

+comedy with an old SNL member, a bad comedy with a new SNL member, a

+vehicle for a punk band, a vehicle for a rap group, a bizarre mystery

+film, and a documentary about porn

+

+<ul>

+<li>ANIMAL

+<li>BATMAN

+<li>CATHERINE

+<li>ELEMENT

+<li>FREAKY

+<li>GIRL

+<li>GOLDMINE

+<li>GUNS

+<li>HOLLYWOOD

+<li>MELODY

+<li>NOON

+<li>REGARDING

+<li>RISING

+<li>ROCK'N'ROLL

+<li>TANK

+<li>VELOCITY

+<li>WARRIOR

+</ul>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_2_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..ce4d0a2e4fdcf80c0cb6d365dd360af91a7dc6ed
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/Puzzle.html
@@ -0,0 +1,36 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.3

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+4.3: Eight Max

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+Wandering through Weisner, Dorothy was impressed by the students'

+artistic talents....

+

+

+  </i></blockquote>

+

+<A HREF="puzzle1.html">Start</A>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/puzzle1.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/puzzle1.html
new file mode 100644
index 0000000000000000000000000000000000000000..b2b95f4c5643af44b4b2d9c49fc5f84815cfbdf6
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_3_Puzzle.html/puzzle1.html
@@ -0,0 +1 @@
+<HTML><HEAD> <TITLE>Eight Max - Part 1</TITLE></HEAD><BODY><TABLE border="0" width="825"> <TR> <TD align="right" width="412"><IMG src="p1_w1.jpg" width="275" height="275"></TD> <TD align="left" width="413"><IMG src="p1_w2.jpg" width="275" height="275"></TD> </TR></TABLE><TABLE border="0" width="825"> <TR> <TD align="center" width="275"><IMG src="p1_w3.jpg"></TD> <TD align="center" width="275"><IMG src="puzzle1.gif"></TD> <TD align="center" width="275"><IMG src="p1_w4.jpg"></TD> </TR> <TR> <TD align="center" width="275"><IMG src="p1_w5.jpg"></TD> <TD align="center" width="275"><IMG src="p1_w6.jpg"></TD> <TD align="center" width="275"><IMG src="p1_w7.jpg"></TD> </TR></TABLE><P align="center"><A href="puzzle2.html">THIS-A-WAY</A><BR><A href="puzzle5.html">THAT-A-WAY</A><BR></BODY></HTML>
\ No newline at end of file
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..ffb4ee49e8a02b10fa0697d5d21d8421ac47aac7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/Puzzle.html
@@ -0,0 +1,39 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.4

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+4.4: Division of Labor

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Dorothy peeks her head into a classroom in Building 2 where she

+observes the following exercises on the board.  "This certainly is a

+queer way of doing mathematics," she thought to herself, "but all the

+students seem to be doing fine with it."

+

+  </i></blockquote>

+

+

+

+

+<IMG SRC="div.gif">

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_4_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..6835bd385742b4b76efee0a0f2578a41a7b8a866
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/Puzzle.html
@@ -0,0 +1,45 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 4.5

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+4.5: Hot Shots

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Dorothy enters into an elegant dining room.  She is amazed to find

+MIT's luminaries Noam Chomsky, Steven Pinker, Marvin Minsky, and the

+Scarecrow sipping coffee and debating all varieties of things.  She

+tries to follow the discussions but there are all manners of

+conversation and she cannot decide which to focus on.  Suddenly her

+eye is drawn to a huge engraving on the wall behind the milk and sugar

+table.

+

+  </i></blockquote>

+

+<center>

+<img alt="hotshots.gif" src="hotshots.gif">

+</center>

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_5_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..f4dfa0505f10df6c51934faf4f3666a5904afaf6
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/Puzzle.html
@@ -0,0 +1,80 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.6

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+4.6: MIT By Foot

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- "Oh Fuck!" said Dorothy, "My camera's starting to fritz!" -->

+

+"Why does everyone at MIT walk around looking at their feet?" wondered

+Dorothy to herself.

+

+  </i></blockquote>

+

+<P>

+<A HREF="picts/large-001.jpg"><IMG SRC="picts/001.jpg"></A>

+<A HREF="picts/large-002.jpg"><IMG SRC="picts/002.jpg"></A>

+<A HREF="picts/large-003.jpg"><IMG SRC="picts/003.jpg"></A>

+<A HREF="picts/large-004.jpg"><IMG SRC="picts/004.jpg"></A>

+<A HREF="picts/large-005.jpg"><IMG SRC="picts/005.jpg"></A>

+<A HREF="picts/large-006.jpg"><IMG SRC="picts/006.jpg"></A>

+<A HREF="picts/large-007.jpg"><IMG SRC="picts/007.jpg"></A>

+<A HREF="picts/large-008.jpg"><IMG SRC="picts/008.jpg"></A>

+<A HREF="picts/large-009.jpg"><IMG SRC="picts/009.jpg"></A>

+<A HREF="picts/large-010.jpg"><IMG SRC="picts/010.jpg"></A>

+<A HREF="picts/large-011.jpg"><IMG SRC="picts/011.jpg"></A>

+<A HREF="picts/large-012.jpg"><IMG SRC="picts/012.jpg"></A>

+<A HREF="picts/large-013.jpg"><IMG SRC="picts/013.jpg"></A>

+<A HREF="picts/large-014.jpg"><IMG SRC="picts/014.jpg"></A>

+<A HREF="picts/large-015.jpg"><IMG SRC="picts/015.jpg"></A>

+<A HREF="picts/large-016.jpg"><IMG SRC="picts/016.jpg"></A>

+<A HREF="picts/large-017.jpg"><IMG SRC="picts/017.jpg"></A>

+<A HREF="picts/large-018.jpg"><IMG SRC="picts/018.jpg"></A>

+<A HREF="picts/large-019.jpg"><IMG SRC="picts/019.jpg"></A>

+<A HREF="picts/large-020.jpg"><IMG SRC="picts/020.jpg"></A>

+<A HREF="picts/large-021.jpg"><IMG SRC="picts/021.jpg"></A>

+<A HREF="picts/large-022.jpg"><IMG SRC="picts/022.jpg"></A>

+<A HREF="picts/large-023.jpg"><IMG SRC="picts/023.jpg"></A>

+<A HREF="picts/large-024.jpg"><IMG SRC="picts/024.jpg"></A>

+<A HREF="picts/large-025.jpg"><IMG SRC="picts/025.jpg"></A>

+<A HREF="picts/large-026.jpg"><IMG SRC="picts/026.jpg"></A>

+<A HREF="picts/large-027.jpg"><IMG SRC="picts/027.jpg"></A>

+<A HREF="picts/large-028.jpg"><IMG SRC="picts/028.jpg"></A>

+<A HREF="picts/large-029.jpg"><IMG SRC="picts/029.jpg"></A>

+<A HREF="picts/large-030.jpg"><IMG SRC="picts/030.jpg"></A>

+<A HREF="picts/large-031.jpg"><IMG SRC="picts/031.jpg"></A>

+<A HREF="picts/large-032.jpg"><IMG SRC="picts/032.jpg"></A>

+<A HREF="picts/large-033.jpg"><IMG SRC="picts/033.jpg"></A>

+<A HREF="picts/large-034.jpg"><IMG SRC="picts/034.jpg"></A>

+<A HREF="picts/large-035.jpg"><IMG SRC="picts/035.jpg"></A>

+<A HREF="picts/large-036.jpg"><IMG SRC="picts/036.jpg"></A>

+<A HREF="picts/large-037.jpg"><IMG SRC="picts/037.jpg"></A>

+<A HREF="picts/large-038.jpg"><IMG SRC="picts/038.jpg"></A>

+<A HREF="picts/large-039.jpg"><IMG SRC="picts/039.jpg"></A>

+<A HREF="picts/large-040.jpg"><IMG SRC="picts/040.jpg"></A>

+<A HREF="picts/large-041.jpg"><IMG SRC="picts/041.jpg"></A>

+<A HREF="picts/large-042.jpg"><IMG SRC="picts/042.jpg"></A>

+<A HREF="picts/large-043.jpg"><IMG SRC="picts/043.jpg"></A>

+<A HREF="picts/large-044.jpg"><IMG SRC="picts/044.jpg"></A>

+<A HREF="picts/large-045.jpg"><IMG SRC="picts/045.jpg"></A>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_6_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..5c44bedeed56cf02da5826016477352e502fefc2
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/Puzzle.html
@@ -0,0 +1,48 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.7

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+4.7 Crosses at the Crossroad

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+"Don't be too exact with this, Dorothy.  After all, the Mystery Hunt

+is just for Entertainment (and Hacking)!"

+

+  </i></blockquote>

+

+  <pre>

+

+1,2 -> 5,13

+7,0 -> 11,9

+12,5 -> 7,11

+11,5 -> 3,5

+1,12 -> 10,5

+12,12 -> 2,8

+3,13 -> 2,2

+2,5 -> 7,10

+6,13 -> 11,4

+13,9 -> 4,3

+

+NB: USPO = 1,1

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_7_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..98b981b1d6d7d29930d6cff736d65c384b2d4a99
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/Puzzle.html
@@ -0,0 +1,66 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 4.8

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+4.8 Invincible

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+

+<P>"Where is everyone going?" asked Dorothy.

+

+<P>"To the Castle, to watch the Master play," said a passerby.  "He's

+never lost there, you know.  Would you like to go, too?"

+

+<P>"I might as well.  I don't know where else I would go.  I'm so lost."

+

+<P>Dorothy followed the stranger, until they came to a guard.  "Before

+you can go on," he said, "you must give me your name and password."

+

+<P>"I'll vouch for her.  My name is TimHunt and my password is IHTFP.

+Can we go, now?"

+

+<P>"Go ahead," said the guard, and they passed through the gate.

+

+<P>"Oooh, Othello!" exclaimed Dorothy.  "What?!" she asked, as Tim gave

+her a look that could have curdled milk.

+

+  </i></blockquote>

+

+  <pre>

+      R18 P18 H13 F13 _11

+      H12 K8  R2  F15 _15

+      H11 O13 Q13 G11 _14

+      P13 N10 S11 S12 _11

+      G14 G15 J15 F12 _17

+      E19 E1  F1  D1  ___

+      Q3  R3  S13 S12 _14

+      J19 G19 J18 P7  _6 

+      B10 C9  A9  B3  _7 

+      K6  J6  K8  J7  _8 

+      Q12 N10 R10 J14 _15

+      J14 N12 K16 L16 _13

+      P10 R9  Q10 O5  _6 

+      Q18 G17 F17 D18 _9 

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..1e2e04b7fb849e9c3ad17a32386b05a2aefc62e7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set4_8_Puzzle.html/index.html
@@ -0,0 +1,41 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 4</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 4</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Puzzle_easy.html">Puzzle 8
+(easier version)</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint4.txt">Hint</A> <A HREF="../hints/solution4.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A><BR>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..de6e0d57569762285649f3bbc2fbaf2a212b44a8
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/Puzzle.html
@@ -0,0 +1,124 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2000, Puzzle 5.8
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<!-- XXX Edit this part here -->
+5.8: A Shore Thing
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+If there's one thing Dorothy has learned in her travails thus far, it's
+that letters often double as numbers and vice versa.  "The two are so
+intertwined, it's often so hard to tell where one ends and the other
+begins!"  Unfortunately, this puzzle looks like it will only compound
+Dorothy's confusion.
+
+  </i></blockquote>
+
+
+<BODY LINK="#0000ff" VLINK="#800080">
+<DIR>
+
+<P><IMG SRC="Grid.gif"></P>
+<B><P>&nbsp;<FONT SIZE=3>Across </P>
+<P>&#9;1</B></FONT>&#9;<FONT SIZE=3>Clio or 2-Down</P>
+<B><P>&#9;5</B></FONT>&#9;<FONT SIZE=3>Attention-getting sound</P>
+<B><P>&#9;9</B></FONT>&#9;<FONT SIZE=3>Sorties into hostile territory</P>
+<B><P>&#9;11</B></FONT>&#9;<FONT SIZE=3>Carried out in silence</P>
+<B><P>&#9;13</B></FONT>&#9;<FONT SIZE=3>Flower of the genus Rhododendron</P>
+<B><P>&#9;14</B></FONT>&#9;<FONT SIZE=3>First-years, in short</P>
+<B><P>&#9;15</B></FONT>&#9;<FONT SIZE=3>A kinswoman of Flossie and Freddie</P>
+<B><P>&#9;16</B></FONT>&#9;<FONT SIZE=3>V X CXI</P>
+<B><P>&#9;18</B></FONT>&#9;<FONT SIZE=3>Those opposing</P>
+<B><P>&#9;20</B></FONT>&#9;<FONT SIZE=3>Deception, here</P>
+<B><P>&#9;22</B></FONT>&#9;<FONT SIZE=3>Frat party delivery</P>
+<B><P>&#9;24</B></FONT>&#9;<FONT SIZE=3>Ending for rock or disk</P>
+<B><P>&#9;27</B></FONT>&#9;<FONT SIZE=3>Official report on the Lewinsky scandal</P>
+<B><P>&#9;29</B></FONT>&#9;<FONT SIZE=3>Hurl</P>
+<B><P>&#9;31</B></FONT>&#9;<FONT SIZE=3>It's leapt in a children's game</P>
+<B><P>&#9;32</B></FONT>&#9;<FONT SIZE=3>Ar follower</P>
+<B><P>&#9;34</B></FONT>&#9;<FONT SIZE=3>Lions or Tigers or Bears (oh my!)</P>
+<B><P>&#9;36</B></FONT>&#9;<FONT SIZE=3>Gershwin brother</P>
+<B><P>&#9;37</B></FONT>&#9;<FONT SIZE=3>Comes</P>
+<B><P>&#9;41</B></FONT>&#9;<FONT SIZE=3>A sight for a sailor's sore eyes</P>
+<B><P>&#9;43</B></FONT>&#9;<FONT SIZE=3>"O Sole ___"</P>
+<B><P>&#9;44</B></FONT>&#9;<FONT SIZE=3>Unpaved trail</P>
+<B><P>&#9;46</B></FONT>&#9;<FONT SIZE=3>Pig ___ poke</P>
+<B><P>&#9;47</B></FONT>&#9;<FONT SIZE=3>Craving</P>
+<B><P>&#9;49</B></FONT>&#9;<FONT SIZE=3>Strangle or mangle</P>
+<B><P>&#9;51</B></FONT>&#9;<FONT SIZE=3>Third smallest inert gas</P>
+<B><P>&#9;55</B></FONT>&#9;<FONT SIZE=3>A small freshwater fish</P>
+<B><P>&#9;56</B></FONT>&#9;<FONT SIZE=3>LV A.D.'s emperor</P>
+<B><P>&#9;58</B></FONT>&#9;<FONT SIZE=3>Darlene portrayer</P>
+<B><P>&#9;59</B></FONT>&#9;<FONT SIZE=3>Often-donated item</P>
+<B><P>&#9;62</B></FONT>&#9;<FONT SIZE=3>Distress signal</P>
+<B><P>&#9;64</B></FONT>&#9;<FONT SIZE=3>15-Across, to Bert</P>
+<B><P>&#9;65</B></FONT>&#9;<FONT SIZE=3>Chalupa alternatives</P>
+<B><P>&#9;67</B></FONT>&#9;<FONT SIZE=3>Devotee</P>
+<B><P>&#9;69</B></FONT>&#9;<FONT SIZE=3>Shaka and others</P>
+<B><P>&#9;70</B></FONT>&#9;<FONT SIZE=3>In an odd fashion</P>
+<B><P>&#9;71</B></FONT>&#9;<FONT SIZE=3>Swinger's sin</P>
+<B><P>&#9;72</B></FONT>&#9;<FONT SIZE=3>Andre's rival</P>
+</FONT><P>&nbsp;</P>
+<B><FONT SIZE=3><P>Down </P>
+<P>&#9;1</B></FONT>&#9;<FONT SIZE=3>Cosi fan Tutte composer</P>
+<B><P>&#9;2</B></FONT>&#9;<FONT SIZE=3>See 1-Across</P>
+<B><P>&#9;3</B></FONT>&#9;<FONT SIZE=3>Actor Mineo</P>
+<B><P>&#9;4</B></FONT>&#9;<FONT SIZE=3>Checked out</P>
+<B><P>&#9;5</B></FONT>&#9;<FONT SIZE=3>Treasury Department division</P>
+<B><P>&#9;6</B></FONT>&#9;<FONT SIZE=3>Wouldn't leave alone</P>
+<B><P>&#9;7</B></FONT>&#9;<FONT SIZE=3>MBA course</P>
+<B><P>&#9;8</B></FONT>&#9;<FONT SIZE=3>Fog</P>
+<B><P>&#9;9</B></FONT>&#9;<FONT SIZE=3>Tiger's weapon</P>
+<B><P>&#9;10</B></FONT>&#9;<FONT SIZE=3>Polio conqueror</P>
+<B><P>&#9;12</B></FONT>&#9;<FONT SIZE=3>"Stop, ___!"</P>
+<B><P>&#9;17</B></FONT>&#9;<FONT SIZE=3>Squealer healer</P>
+<B><P>&#9;19</B></FONT>&#9;<FONT SIZE=3>Skin stripe</P>
+<B><P>&#9;21</B></FONT>&#9;<FONT SIZE=3>Vier - ein</P>
+<B><P>&#9;23</B></FONT>&#9;<FONT SIZE=3>Caught, as a cold</P>
+<B><P>&#9;25</B></FONT>&#9;<FONT SIZE=3>Faced with a dilemma</P>
+<B><P>&#9;26</B></FONT>&#9;<FONT SIZE=3>"Yikes!"</P>
+<B><P>&#9;28</B></FONT>&#9;<FONT SIZE=3>Say you're coming</P>
+<B><P>&#9;30</B></FONT>&#9;<FONT SIZE=3>Rani's dress</P>
+<B><P>&#9;33</B></FONT>&#9;<FONT SIZE=3>Junction line</P>
+<B><P>&#9;35</B></FONT>&#9;<FONT SIZE=3>Verbal avian</P>
+<B><P>&#9;37</B></FONT>&#9;<FONT SIZE=3>Surrounded by</P>
+<B><P>&#9;38</B></FONT>&#9;<FONT SIZE=3>Beatles' metermaid</P>
+<B><P>&#9;39</B></FONT>&#9;<FONT SIZE=3>Typical wise guy name</P>
+<B><P>&#9;40</B></FONT>&#9;<FONT SIZE=3>Like SnO</P>
+<B><P>&#9;42</B></FONT>&#9;<FONT SIZE=3>Metallica drummer Ulrich</P>
+<B><P>&#9;45</B></FONT>&#9;<FONT SIZE=3>Get a move on</P>
+<B><P>&#9;48</B></FONT>&#9;<FONT SIZE=3>Wave unit</P>
+<B><P>&#9;50</B></FONT>&#9;<FONT SIZE=3>Tingle of the movies</P>
+<B><P>&#9;52</B></FONT>&#9;<FONT SIZE=3>Like an 18th-century room</P>
+<B><P>&#9;53</B></FONT>&#9;<FONT SIZE=3>Weaver, for one</P>
+<B><P>&#9;54</B></FONT>&#9;<FONT SIZE=3>"...___, brutish, and short"</P>
+<B><P>&#9;57</B></FONT>&#9;<FONT SIZE=3>Synonym of 63-Down</P>
+<B><P>&#9;60</B></FONT>&#9;<FONT SIZE=3>France, once</P>
+<B><P>&#9;61</B></FONT>&#9;<FONT SIZE=3>Often litigious organization</P>
+<B><P>&#9;63</B></FONT>&#9;<FONT SIZE=3>Synonym of 57-Down</P>
+<B><P>&#9;66</B></FONT>&#9;<FONT SIZE=3>Concorde, e.g.</P>
+<B><P>&#9;68</B></FONT>&#9;<FONT SIZE=3>Exist</P></DIR>
+</FONT></BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/Solution.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/Solution.html
new file mode 100644
index 0000000000000000000000000000000000000000..da9a63aaae4d05596fee9521513f07aa3a8f2a3b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/Solution.html
@@ -0,0 +1,48 @@
+  <html>
+
+  <head>
+  <title>
+
+
+Mystery Hunt 2000, Set 5 Metapuzzle (Solution)
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table border=0 width=100%>
+  <tr><td align=left valign=top><h2>
+
+
+Set 5 Metapuzzle (Solution)
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>
+  </td></tr></table>
+
+
+
+  <pre>
+Author: Dan Katz
+
+If the puzzles are ordered by their first two letters (DO, RE, MI, FA,
+SO, LA, TI, DO):
+
+5.2 DORADO
+5.4 RETRO
+5.7 MIRTH
+5.3 FARADAYS
+5.5 SONIC BOOM
+5.8 LAKEFRONT VIEW
+5.1 TITHE
+5.6 DOUBLE DARE
+
+The last two letters in each answer spell out DOROTHY and SOMEWHERE,
+the name and password for Round 5
+
+  </pre>
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/asset_index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/asset_index.html
new file mode 100644
index 0000000000000000000000000000000000000000..cd6706c9a8469395953765a4501261f794989bf5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/asset_index.html
@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>2000 Mystery Hunt · MIT Mystery Hunt / Puzzle Club</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400&family=Syncopate:wght@700&display=swap"
+      rel="stylesheet"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="/style.css" type="text/css" />
+    <meta
+      name="description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+    <meta property="og:image" content="/images/header-coin.png" />
+    <meta
+      property="og:description"
+      content="The MIT Mystery Hunt is an internationally renowned puzzle competition which takes place every January on MIT campus and attracts hundreds of participants from all over the world."
+    />
+  </head>
+  <body>
+    <div id="header"></div>
+    <main id="main">
+
+<h1><a href="../huntsbyyear.html">Archives</a> / 2000 Mystery Hunt </h1>
+
+<h3>Description</h3>
+<p> The 2000 Mystery Hunt was based on <em>Wizard of Oz</em> and asked teams to help guide Dorothy back
+home using the Tornado-Operated Object Levitator (T.O.O.L.), which required a coin for its operation.</p>
+<p> The coin was found at 2:18am on Sunday by Paintttniap, in a planter outside 9-136.</p>
+
+<h3>Credits</h3>
+The 2000 Mystery Hunt was written by Roger Barkan, Jennifer Berk, Jamie Coffin, Jed Goldstone, Heather Handley, Ann Jones, Ray Jones, Dan Katz, Kiran Kedlaya, Rose Koch, Brian Litofsky, Christopher Long, Catherine Moore, Chris Morse (Captain), Darren Rigby, Dave Savitt, and Brian Tivol.
+
+<h3>The Hunt Introduction</h3>
+
+<p>Welcome to MH2K! (That's Mystery Hunt 2000 for those of you
+are acronymatically challenged.)  This year, your puzzle-solving
+skills are sorely needed in order to help our hero, Dorothy Gale,
+return to her monochromatic homeland.</p>
+
+<p>The Munchkin Information Processing Board (MIPB) has offered
+to help Dorothy get home through the use of their newly designed
+Tornado-Operated Object Levitator (T.O.O.L.) Unfortunately, as a
+consequence of inventive eccentricity, the T.O.O.L. can only be
+operated with a special coin, and nobody on MIPB can remember where
+they left it. Your goal is to recover this coin.</p>
+
+<p>Fortuitously, you have a powerful computer system to aid you
+in your search. MIPB possesses a highly advanced network
+affectionately known as the Wonderfully Intelligent Zenith of All
+Recovery Devices (W.I.Z.A.R.D.)  that should be able to scan the
+campus and trace the location of the coin.  However, Wendy the
+Insidiously Tyrannical Computer Hacker (W.I.T.C.H.) has installed a
+series of password blocks into W.I.Z.A.R.D. and no one knows how to
+access its higher functions.</p>
+
+<p>It is known that W.I.T.C.H. has a careless habit of inadvertently
+leaving clues to her passwords around the MIT campus. Rather than make
+you look for them, Dorothy has graciously volunteered to brave the
+wild jungles of MIT in search of W.I.T.C.H.'s trail of devious
+puzzles, taking a pocket W.I.Z.A.R.D. terminal with her that will
+automatically record her adventures and post them online.  Some of her
+adventures may bring her into contact with some familiar faces; it
+seems she's not the only one who had a recent run-in with a
+tornado....</p>
+
+<p>You, the remote solving team, must solve W.I.T.C.H.'s puzzles, and
+extract from them a username and password, which will grant you access
+to the appropriate puzzles to deduce the second username and password,
+and so forth. Stay in contact with MIPB regarding your progress; they
+are working together with you to discover the coin, and they'll be
+glad to TRY to help you if you have questions.</p>
+
+<p>Good luck, keep your wits about you, and remember: There's no
+place like hell.</p>
+
+<h3>The Hunt and Solutions (linked)</h3>
+<ul>
+  <li><a href="set1">Puzzle Set 1</a></li>
+  <li><a href="set2">Puzzle Set 2</a></li>
+	<li><a href="set3">Puzzle Set 3</a></li>
+	<li><a href="set4">Puzzle Set 4</a></li>
+	<li><a href="set5">Puzzle Set 5</a></li>
+  <li><a href="endgame.html">Endgame</a></li>
+</ul>
+
+<h3>Photos</h3>
+<p>The photos below were accompanied by the following announcement: <em>Insidious news! Bitter about the coin they lost last year, Carmen and her gang have caught up with Dorothy and are preparing to exact a cruel revenge. Film at 11. </em></p>
+
+<div class="photowithlabel">
+<img src="vilepics/dorothy.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothycarmen.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothydan.jpg" class="photoframe"><br><br>
+<img src="vilepics/dorothyvile.jpg" class="photoframe"><br><br>
+</div>
+
+    </main>
+    <div id="footer"></div>
+  </body>
+  <script type="module" src="/package.js"></script>
+  <script type="module" src="/Header.js"></script>
+  <script type="module" src="/Nav.js"></script>
+  <script type="module" src="/Title.js"></script>
+  <script type="module" src="/Toggle.js"></script>
+  <script type="module" src="/Footer.js"></script>
+  <script type="module" src="/main.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/hint5.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/hint5.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c4c1325cbc8eeb8dda54b3a607c6960d1632ebd3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/hint5.txt
@@ -0,0 +1,11 @@
+HINT 5
+
+08/29/92        _ _ * _ _   _ _ _ _ _
+09/27/93        _ _ * _ _   _ _ _ _
+04/13/94        _ _ _ _ *   _ _ _ _
+07/23/95        _ _ _ _ _ _ _   _ _ _ _ _ _ _ _ * _ _ _
+01/21/96        _ _ _ _ _ _   * _ _ _ _ _ _
+04/28/97        _ _ _ _   _ * _ _
+08/30/98        * _ _ _   _ _ _ _ _ _ _ _
+07/24/99        _ _ _ _   _ _ * _ _ _ _ _
+01/03/00        Joanie Lee AND Chris Irvine
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..54fb270f9ffb8664877fe71058debfa1b9c3dc23
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/index.html
@@ -0,0 +1,40 @@
+<HTML>

+<HEAD>

+<TITLE>Mystery Hunt 2000, Set 5</TITLE>

+<LINK REV=owns HREF="mailto:puzzle@mit.edu">

+</HEAD>

+

+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"

+VLINK="#000000">

+

+

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<H3>Puzzles, Set 5</H3>

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../index.html">Back to hunt</a>

+  </td></tr></table>

+

+

+<BLOCKQUOTE>

+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>

+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>

+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>

+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>

+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>

+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>

+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>

+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>

+<BR>

+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>

+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>

+</BLOCKQUOTE>

+If you participated in the Hunt, please fill out the <A

+HREF="../survey.txt">survey</A>.

+

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/solution5.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/solution5.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9d1b439a6c5c84b3d94e20bae4b5d96819ae556a
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/solution5.txt
@@ -0,0 +1,22 @@
+HINT 5 Solution
+
+Author: Dan Katz
+
+Joanie Lee, better known as Chyna, and Chris Irvine AKA Chris Jericho, on
+January 3 became the first ever co-holders of the WWF Intercontinental
+Championship (a singles title.) For each date, we place the real name of
+the wrestler that won the IC belt on that day in the blanks, and we get:
+
+08/29/92	daVid smith (The British Bulldog)
+09/27/93	scOtt hall (Razor Ramon)
+04/13/94	keviN nash (Diesel)
+07/23/95	michael hickenboTtom (Shawn Michaels)
+01/21/96	dustin Runnels (Goldust)
+04/28/97	owen hArt (Owen Hart)
+08/30/98	Paul levesque (Hunter Hearst Helmsley)
+07/24/99	adam coPeland (Edge)
+
+Reading down the starred blanks, given here in capital letters, gives VON
+TRAPP.
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/survey.txt b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/survey.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bea6442560f03c93420e9ab12c218a57a0967fca
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5/survey.txt
@@ -0,0 +1,40 @@
+
+We hope you aren't tired of answering our questions, but there is one
+last set we'd like you to try out.  Your comments will help future
+Hunts from succumbing to our pitfalls and possibly give us a warm
+fuzzy feeling inside.  You can answer either as teams or individuals,
+as you see fit.
+
+1. What is your team's name?
+
+2. How many years has your team competed in the Mystery Hunt?  How
+   many full-time solvers and how many come-and-go solvers were on
+   your team?
+
+3. What are your overall impressions of this year's Hunt?
+
+4. Do you feel as if you'd want to return next year?
+
+5. Did you feel there were any administrative or logistical problems
+   this year that future organizers could be warned about?
+
+6. Is there a specific member of MIPB you'd like to send a message to?
+   Is there a specific puzzle whose creator you'd like to send a
+   message to?
+
+7. Which puzzles did you find to be...
+      ...the most enjoyable?
+      ...the least enjoyable?
+      ...(in)elegant?
+      ...(un)memorable?
+      ...conducive to silly quotes?
+   (Feel free to list more than one for each category; extra comments
+   appreciated.)
+
+8. What sorts of comments worthy of preservation and ridicule did your
+   team members blurt out?  Do you have any comic stories worth
+   retelling?
+
+9. Do you have any other generic comments?
+
+Please send surveys to puzzle@mit.edu.
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..9b0db8359ee41fea35e3d3f4c7620de76d845a6a
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/Puzzle.html
@@ -0,0 +1,56 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 5.1

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+5.1: A Dozen Dozes

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+<P>Dorothy finds herself in a dorm room...</P>

+<P>She is astounded by the panoramic mess that she sees as she scans the room.</P>

+

+  </i></blockquote>

+

+

+

+<P>&nbsp;</P>

+

+<P><A HREF="image01.jpg">1</A> <A HREF="image03.jpg">3</A></P>

+<P><A HREF="image02.jpg">2</A> <A HREF="image04.jpg">4</A></P>

+<P>&nbsp;</P>

+<P>Some possibly helpful insets:</P>

+<P>&nbsp;</P>

+<P><A HREF="image08.jpg">A

+<P><A HREF="image12.jpg">B

+<P><A HREF="image13.jpg">C

+<P><A HREF="image14.jpg">D

+<P><A HREF="image16.jpg">E

+<P><A HREF="image18.jpg">F

+<P><A HREF="image19.jpg">G

+

+

+</BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

+

+

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_1_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..a54a54a7a43f428cd0daeddfe36c954dc3cf28ae
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/Puzzle.html
@@ -0,0 +1,95 @@
+  <html>

+

+  <head>

+  <title>

+

+

+Mystery Hunt 2000, Puzzle 5.2

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+5.2: Isn't it Romantic?

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Dorothy's eye is caught by a poster outside room 14N-305.

+

+  </i></blockquote>

+

+

+

+<P>&nbsp;</P></FONT>

+<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#000000" CELLPADDING=7 WIDTH=590>

+<TR><TD WIDTH="20%" VALIGN="TOP">

+<P ALIGN="CENTER"><FONT SIZE=2>aureus</FONT></TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<FONT SIZE=2><P ALIGN="CENTER">estanho</FONT></TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+</TR>

+<TR><TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<FONT SIZE=2><P ALIGN="CENTER">lattina</FONT></TD>

+</TR>

+<TR><TD WIDTH="20%" VALIGN="TOP">

+<FONT SIZE=2><P ALIGN="CENTER">argent&eacute;</FONT></TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<FONT SIZE=2><P ALIGN="CENTER">n&iacute;quela</FONT></TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+</TR>

+<TR><TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<FONT SIZE=2><P ALIGN="CENTER">cuivr&eacute;</FONT></TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+</TR>

+<TR><TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP">

+<P>&nbsp;</TD>

+<TD WIDTH="20%" VALIGN="TOP" BGCOLOR="#ffff00">

+<P>&nbsp;</TD>

+</TR>

+</TABLE>

+

+<FONT SIZE=2><P>&nbsp;</P></FONT></BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_2_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..971c7d1a01de3a175bfa24a6101930f1536b6a9b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/Puzzle.html
@@ -0,0 +1,65 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 5.3

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+5.3: An MIT Dialog

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+While walking though the halls of this prestigious academic

+institution, Dorothy overhead a very strange conversation.  Did she

+know what it meant?  Of course!

+

+

+  </i></blockquote>

+

+  <pre>

+(6 6)		Barnabas: Rest.                

+(7 12)		Albert:  Peahen?  She's one.    

+(6 7)		Andrew:  Odd seal.              

+(7 13)		Thor:  Fly a nautical mile.     

+(5 11)		Kiran:  Help her game.          

+(6 5)		Alan:  Tan dill.                

+(9 6)		Forrest:  Jen's feet.           

+(4 11)		Dharma:  Even do fez.           

+(5 6)		Dilbert:  AV ad.                

+(9 6)		Heather:  CC: Belize            

+(5 5)		Ray:  Sahara D.                 

+(4 6)		Jed:  No hutch.                 

+(7 6)		Ann:  Earthy gown.              

+(7 8)		Charity:  Door, ma'am.          

+(6 5)		Sam:  Showiest.                 

+(8 12)		Tai:  Rapscallion khakis.       

+(7 9)		Chris:  Rub underdog.           

+(10 6)		Anatoly:  Ingrowths.            

+(8 5)		Jana:   Nonlethal.              

+(8 6)		Glen:  Wild Arlene!

+(7 9)		Maria:  A rabbi peril.            

+(5 6)		Melanie:  Cads.                 

+(5 9)		Helga: A rust rash.            

+(3 7)		Mel:  Pawn jar.                 

+(6 5)		Hector:  Boner.                 

+(9 5)		Toni:  Ritz riches.              

+

+

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_3_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..6823f30cb84cc1b0c0ea72cbc1037d6f99db60e5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/Puzzle.html
@@ -0,0 +1,86 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 5.4

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+5.4: Art for Art's Sake

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+

+Dorothy passes through The Center for Theoretical Physics.

+

+"My, my," she says.  "I cannot remember seeing such beatiful art

+hanging anywhere else at MIT.  They have an original Calder and some

+Ansel Adams prints.  Those physicists really have good taste."

+

+  </i></blockquote>

+<center>

+<!-- This should be in a fixed width font. -->

+<tt>

+<b> 

+<font size=+15>

+10257530823353703020285144308<br>

+06590938316216062366719509433<br>

+57391543462569856828871320292<br>

+92517804606930798219320605031<br>

+81149510758634462504841285761<br>

+78970825129838435021163758720<br>

+53529822762737121819660100384<br>

+05181332819417002413509603902<br>

+19946321148518688551619040455<br>

+</font>

+</b>

+</tt>

+</H2>

+</center>

+

+<pre>

+

+Akron Art Museum

+Brooklyn Museum of Art

+Cedar Rapids Museum of Art

+Cleveland Museum of Art

+Dallas Museum of Art

+De Young Museum

+Denver Art Museum

+E. L. Wiegand Gallery

+Farnsworth Art Museum

+Georgia O'Keeffe Museum

+Great Plains Art Collection

+Madison Art Center

+Minneapolis Institute of Arts

+Museum of Fine Arts, Boston

+New Orleans Museum of Art

+Norman Rockwell Museum

+North Dakota Museum of Art

+Norton Museum of Art

+Orlando Museum of Art

+Phoenix Art Museum

+Swope Art Museum

+Tuscon Museum of Art

+Utah Museum of Fine Arts

+Virginia Museum of Fine Arts

+Worcester Art Museum

+Yellowstone Art Museum

+</pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_4_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..7c68a1af482405c57f74ed2f3f7453bf187c04ec
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/Puzzle.html
@@ -0,0 +1,55 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 5.5

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+5.5: The Play's the Thing

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+Outside NE43-324, Dorothy spied a poster hanging on a bulletin board.

+

+<P>The Tin Woodsman said "I think you should copy that down.  It looks

+like it could be important."

+  </i></blockquote>

+

+  <pre>

+

+CATELLSMUCHSHALLBANQUOSISER

+

+ANDHINKNOMOREOFTHISNIGHSENTS

+

+SEWAKSNTRETEDHERCOMEFORTH

+

+IHRSHOTMYSELFTOTELLYOOFI

+

+ILLGIVETHILEAVETHEESOMUCMNEY

+

+BUTLETITBEHOATDED

+

+GOYOUTERHARLEURHEREREMAIN

+

+TOCHANGTHECODSHEADFOTHESSTIL

+

+ANDINSTANTYUNOCKMYFORTERE

+

+

+  </pre>

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

+

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_5_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..f9557a2772bfed88f21c4a9462542cf81e50c037
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/Puzzle.html
@@ -0,0 +1,96 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 5.6

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table border=0 width=100%>

+  <tr><td align=left valign=top><h2>

+

+5.6: The Duck Konundrum

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+

+Still lost, Dorothy asked a random passerby if they had a guidebook of

+some kind, and she was presented with a thick book marked MIT

+Bulletin. Paging through, however, she couldn't make heads nor tails of

+it. "So many complicated directions..." she groaned.

+

+  </i></blockquote>

+

+  

+

+1. Gather the following supplies: five armless chairs and an armchair, six members of your team, three metal cans containing red, yellow, and blue paint, three watering cans of notably different sizes, and a live duck. Please do not endanger the life of the duck at any time. We prefer that no animals be harmed during the finding of this coin.<p>

+

+2. Place the chairs in a circle, evenly spaced. Label the seats of the chairs in red paint with the numbers 1 to 6, labelling the armchair 1 and proceeding in ascending order clockwise.<p>

+

+3. When the paint dries, have a team member sit in each chair (facing the center of the circle.) The team members have numbers but those numbers will change throughout the game. The member in the armchair is always member #1. Then, member numbering proceeds clockwise around the circle regardless of chair number. (Note that at the beginning, everyone has the same number as the chair they are sitting in... this will change.) Any team member who is not sitting has no number. If there is no one sitting in the armchair, everyone sitting down becomes #12 1/2 until someone sits in the armchair. Number changes become effective at the beginning of each step.<p>

+

+4. Get the duck to sit under chair #5. If it is reluctant, give it food. Be friendly and it will eventually play along. Ducks love mystery hunts.<p>

+

+5. Paint member #4 blue with yellow polka dots (whether he likes it or not. If he was going to be a baby, he shouldn't have sat in chair #4.)<p>

+

+6. Have members #3 and #6 switch places, taking their chairs with them.<p>

+

+7. Paint each paint can with a mixture of the paint from the other two cans. Mix the paint from the purple can and the green can in the smallest watering can, mix the paint from the green can and orange can in the largest watering can, and mix the paint from the purple can and the orange can in the medium watering can.<p>

+

+8. Add up the numbers of all the members and call the result N. Have member #4 repeatedly chant the Nth letter of the alphabet until further notice. At this point, if the duck is paying attention, he should waddle under the chair directly across the circle from him (the duck.) If not, you probably did something wrong and should start over until it works.<p>

+

+9. Send member #3 into the kitchen to get some Cheetos and indigo paint. (You do have a kitchen with those things in them, don't you?) Meanwhile, the member chanting a letter should stop chanting and paint the letter they have been chanting on the underside of the chair immediately to their right in the only primary-colored paint not being worn by a team member.<p>

+

+10. Repeat steps 8 and 9, but ignore any sentence that contains the word "waddle."<p>

+

+11. New cup! New cup! Move down! Move down! Every team member in the room moves one chair to their left. The duck, wanting to balance things out, will instinctively move a number of chairs to the right equal to the number of team members in the room. Good duck.<p>

+

+12. What's taking the Cheeto-gatherers so long? Send a search party to the kitchen consisting of every team member who has been in the armchair at least once.<p>

+

+13. Each team member in the room should paint the Nth letter of the alphabet on the underside of every occupied chair except his own, where N is either the sum of the present members' numbers or the sum of the numbers of the occupied chairs, whichever is higher, unless the common leopard is striped, in which case the lower number should be used. The team member in the highest-numbered chair should use paint from the big watering can, while any other team members should use paint from the medium watering can.<p>

+

+14. At this point, the kitchen party should return, armed with a sugar bowl full of indigo paint and a bucket of Cheetos. (Yay!) All of them sit down to fill all of the unoccupied chairs according to the following two rules: 1) Whoever is wearing the most unusual paint job sits in the armchair, and 2) everyone else from the kitchen sits in a chair next to the chair (not position, but chair) that they were sitting in when the game started. <p>

+

+15. The two chairs next to the chair under which our hero, the duck, currently resides, are occupied by two people who have, together, sat in every chair except one, which we shall call the happy chair. In the duck's honor, paint the first letter of the duck's name on the underside of the happy chair, using any color of paint that is contained in a paint can and which is not found on the costume Hulk Hogan wore for most of his WWF tenure.<p>

+

+16. Member #1, switch chairs with member #6, but return to the same positions in the circle. Member #2, switch places with member #4. Incidentally, the duck's name is Harold. Member #5, switch chairs with member #3, but return to the same positions in the circle. Member #6, paint your left elbow purple. Incidentally, the duck's name is Reginald. Incidentally, the duck's name is Victor. Member #6, paint your right elbow orange.<p>

+

+17. By the way, the reason that last step didn't make any sense is that you were supposed to ignore alternating sentences, starting with the first one... or was it the second one? Oh, I don't remember. I'm sure you can figure it out, Mr. Hotshot Mystery Hunter.<p>

+

+18. Remember that Beatles parody on Sesame Street about a letter? Paint that letter, in the most recent color used to paint a team member, on the underside of the farthest chair from the duck which does not contain a painted team member.<p>

+

+19. Time to play "Duck Duck Duck"! This is a variant of "Duck Duck Goose" in which whoever's "it" walks around the circle clockwise touching players heads saying the word "duck" for ten minutes, beginning at the end of this step, and then sits in any vacant seat. (Make the obvious assumption that all steps take precisely two minutes from start to finish.) The person sitting in the chair to the left of the duck is "it." Go!<p>

+

+20. Hey, that armchair's not messy yet. Take every paint that has some of the original blue paint in it (yes, including the blue) and with each of these paint colors, paint the first letter of Chapter 19 of The Hitchhiker's Guide To The Galaxy on the underside of the armchair.<p>

+

+21. If the duck has, at some point, been under chair #3, paint over any letters on chair #6 with orange, and have members #2 and #4 switch places. Otherwise, have members #1 and #4 switch places, and paint the Roman numeral for member #3's chair number on its underside in yellow.<p>

+

+22. The duck quacks. Everybody gazes in awe, unless they are "it" or have no letter painted on the underside of their chair. Member #2 becomes so overwrought with excitement, he accidentally puts his foot in the sugar bowl. The team member across from the armchair begins eating the Cheetos. The duck, overwhelmed by the attention, goes to sit on the lap of the member with the most colors on the underside of their chair.<p>

+

+23. If any member can move to a chair of the number that comes immediately after the number of the chair they are currently sitting in, they do. Repeat that direction until no one can follow it. (And of course, you can't stand up with a duck on your lap. Duh.)<p>

+

+24. Shall we redefine N again? Now, it's the sum of the numbers of the chairs in which no one gazed in awe at the duck. Paint the N+1th letter of the alphabet on the underside of the chair containing a team member who now has messy hands, in the color his hands have now turned. (For goodness sake, use a napkin next time!)<p>

+

+25. Each team member should now add up the numbers of the chairs they have yet to sit in. These are their lucky numbers. One member's lucky number should be exactly double another member's lucky number. The member sitting across from the member sitting between the two members mentioned in the last sentence is now known as the Duck King, for no particular reason.<p>

+

+26. By the way, if you did everything right, if you start with the member sitting in the seat with the duck and proceed clockwise, the first four people should be named, in order, Bo, Ty, Ed, and Zoz. If this is not true, you must have used people with the wrong names, and you should start all over again. Or maybe you didn't skip step 21. Oh, that's right, I forgot to tell you!! You were supposed to skip step 21. It was a misprint. <p>

+

+27. The Duck King should proudly write his first name twice on the underside of his chair; once in the color of the cover of Soul Coughing's brilliant album, El Oso, and once in the color that currently appears on one clumsy team member's foot.<p>

+

+28. Almost done! Everybody stand up, line the chairs up in order from 1 to 6, and tip them over so you see their undersides. Now read from left-to-right, one color at a time, in whatever order of colors seems natural. You'll get your answer (although it'll be in a strange and mysterious language. What, you thought this was going to be easy?!?!)<p>

+

+29. Go wash up. Some of you really are a mess. Slobs.<p>

+

+  

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_6_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..64ca131bd4cc0e17f194d372aacab933d1ea42e3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/Puzzle.html
@@ -0,0 +1,130 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 5.7

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+5.7: Cross-Check

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+"Do you ever get the feeling that things around here are not always what

+they appear to be?" asked the Lion, a bit sheepishly. <p>

+"All the time. But at least <i>some</i> things never change... like crossword puzzles!"

+cried Dorothy with glee, as she sat down and began solving the puzzle in

+<I>The Tech</I>.<p>

+The Scarecrow was skeptical. "Are you sure you're not missing

+something?" 

+

+  </i></blockquote>

+

+

+<center>

+<p><img SRC="Puzzle.gif" height=498 width=498></center>

+

+<br>&nbsp;

+<table BORDER=0 CELLSPACING=0 CELLPADDING=7 WIDTH="100%" >

+<tr>

+<td VALIGN=TOP WIDTH="50%">

+<dir><b><font size=+0>Across</font></b>

+<br><font size=+0><b>1. </b>Over</font>

+<br><font size=+0><b>5. </b>Da ___ al signo</font>

+<br><font size=+0><b>9. </b>Bothers</font>

+<br><font size=+0><b>13. </b>Author Haley</font>

+<br><font size=+0><b>14. </b>Division signs</font>

+<br><font size=+0><b>16. </b>A fish</font>

+<br><font size=+0><b>17. </b>Type of computer arithmetic</font>

+<br><font size=+0><b>19. </b>Pub orders</font>

+<br><font size=+0><b>20. </b>Criminal</font>

+<br><font size=+0><b>21. </b>Regret</font>

+<br><font size=+0><b>22. </b>Grow weary</font>

+<br><font size=+0><b>23. </b>A Native American</font>

+<br><font size=+0><b>25. </b>Rapper born James Todd Smith</font>

+<br><font size=+0><b>27. </b>Just like last time</font>

+<br><font size=+0><b>31. </b>Stun</font>

+<br><font size=+0><b>32. </b>Cease</font>

+<br><font size=+0><b>33. </b>Rendezvous</font>

+<br><font size=+0><b>37. </b>Track star Lewis</font>

+<br><font size=+0><b>39. </b>Simmers</font>

+<br><font size=+0><b>42. </b>Lift (up)</font>

+<br><font size=+0><b>43. </b>Part of the ear</font>

+<br><font size=+0><b>45. </b>Stink</font>

+<br><font size=+0><b>47. </b>Winter woe</font>

+<br><font size=+0><b>48. </b>Replacement</font>

+<br><font size=+0><b>52. </b>Ghastly</font>

+<br><font size=+0><b>55. </b>Den</font>

+<br><font size=+0><b>56. </b>___-bodied</font>

+<br><font size=+0><b>57. </b>Do something</font>

+<br><font size=+0><b>59. </b>Like rush-hour traffic</font>

+<br><font size=+0><b>63. </b>An amphibian</font>

+<br><font size=+0><b>64. </b>Puzzle type</font>

+<br><font size=+0><b>66. </b>Teenager's woe</font>

+<br><font size=+0><b>67. </b>Brimless hat</font>

+<br><font size=+0><b>68. </b>Pilgrim</font>

+<br><font size=+0><b>69. </b>Stripe</font>

+<br><font size=+0><b>70. </b>Young woman</font>

+<br><font size=+0><b>71. </b>Help</font></dir>

+</td>

+

+<td VALIGN=TOP WIDTH="50%">

+<dir><b><font size=+0>Down</font></b>

+<br><font size=+0><b>1. </b>Construction piece</font>

+<br><font size=+0><b>2. </b>Hodgepodge</font>

+<br><font size=+0><b>3. </b>Upcoming</font>

+<br><font size=+0><b>4. </b>Rhododendron relative</font>

+<br><font size=+0><b>5. </b>Scribes</font>

+<br><font size=+0><b>6. </b>Blood classification</font>

+<br><font size=+0><b>7. </b>Not foul</font>

+<br><font size=+0><b>8. </b>Like some heroes</font>

+<br><font size=+0><b>9. </b>Collection of sculptures</font>

+<br><font size=+0><b>10. </b>Sound</font>

+<br><font size=+0><b>11. </b>Twist</font>

+<br><font size=+0><b>12. </b>Neuter</font>

+<br><font size=+0><b>15. </b>Author Calvino</font>

+<br><font size=+0><b>18. </b>Household gods</font>

+<br><font size=+0><b>24. </b>Border</font>

+<br><font size=+0><b>26. </b>Computer monitor</font>

+<br><font size=+0><b>27. </b>Wise man</font>

+<br><font size=+0><b>28. </b>Israeli statesman Abba</font>

+<br><font size=+0><b>29. </b>TV sportcaster Albert</font>

+<br><font size=+0><b>30. </b>Turn inside out</font>

+<br><font size=+0><b>34. </b>Jellystone National Park denizen</font>

+<br><font size=+0><b>35. </b>"No contest" plea, for short</font>

+<br><font size=+0><b>36. </b>Terrible age</font>

+<br><font size=+0><b>38. </b>Sick</font>

+<br><font size=+0><b>40. </b>Cry</font>

+<br><font size=+0><b>41. </b>Hated</font>

+<br><font size=+0><b>44. </b>Tennis shot</font>

+<br><font size=+0><b>46. </b>South American capital</font>

+<br><font size=+0><b>49. </b>Leaf</font>

+<br><font size=+0><b>50. </b>A vertebra</font>

+<br><font size=+0><b>51. </b>Tablet</font>

+<br><font size=+0><b>52. </b>Sailor's term of endearment</font>

+<br><font size=+0><b>53. </b>Over</font>

+<br><font size=+0><b>54. </b>Category</font>

+<br><font size=+0><b>58. </b>Toddler</font>

+<br><font size=+0><b>60. </b>Supplicate</font>

+<br><font size=+0><b>61. </b>Deter</font>

+<br><font size=+0><b>62. </b>Leave out</font>

+<br><font size=+0><b>65. </b>Taro product</font></dir>

+</td>

+</tr>

+</table>

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_7_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..a9218f250c19908f672af6d8ca50a8d2cc3fbc82
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/Puzzle.html
@@ -0,0 +1,124 @@
+  <html>

+

+  <head>

+  <title>

+

+Mystery Hunt 2000, Puzzle 5.8

+

+  </title>

+  </head>

+

+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>

+

+  <table width=100% border=0>

+  <tr><td align=left valign=top><h2>

+

+<!-- XXX Edit this part here -->

+5.8: A Shore Thing

+

+  </h2></td>

+  <td align=right valign=top width=300>

+<a href="../../index.html">Back to hunt</a> | <a href="../index.html">Back to puzzle set</a>

+  </td></tr></table>

+

+  <blockquote><i>

+

+<!-- XXX Edit this part here -->

+If there's one thing Dorothy has learned in her travails thus far, it's

+that letters often double as numbers and vice versa.  "The two are so

+intertwined, it's often so hard to tell where one ends and the other

+begins!"  Unfortunately, this puzzle looks like it will only compound

+Dorothy's confusion.

+

+  </i></blockquote>

+

+

+<BODY LINK="#0000ff" VLINK="#800080">

+<DIR>

+

+<P><IMG SRC="Grid.gif"></P>

+<B><P>&nbsp;<FONT SIZE=3>Across </P>

+<P>&#9;1</B></FONT>&#9;<FONT SIZE=3>Clio or 2-Down</P>

+<B><P>&#9;5</B></FONT>&#9;<FONT SIZE=3>Attention-getting sound</P>

+<B><P>&#9;9</B></FONT>&#9;<FONT SIZE=3>Sorties into hostile territory</P>

+<B><P>&#9;11</B></FONT>&#9;<FONT SIZE=3>Carried out in silence</P>

+<B><P>&#9;13</B></FONT>&#9;<FONT SIZE=3>Flower of the genus Rhododendron</P>

+<B><P>&#9;14</B></FONT>&#9;<FONT SIZE=3>First-years, in short</P>

+<B><P>&#9;15</B></FONT>&#9;<FONT SIZE=3>A kinswoman of Flossie and Freddie</P>

+<B><P>&#9;16</B></FONT>&#9;<FONT SIZE=3>V X CXI</P>

+<B><P>&#9;18</B></FONT>&#9;<FONT SIZE=3>Those opposing</P>

+<B><P>&#9;20</B></FONT>&#9;<FONT SIZE=3>Deception, here</P>

+<B><P>&#9;22</B></FONT>&#9;<FONT SIZE=3>Frat party delivery</P>

+<B><P>&#9;24</B></FONT>&#9;<FONT SIZE=3>Ending for rock or disk</P>

+<B><P>&#9;27</B></FONT>&#9;<FONT SIZE=3>Official report on the Lewinsky scandal</P>

+<B><P>&#9;29</B></FONT>&#9;<FONT SIZE=3>Hurl</P>

+<B><P>&#9;31</B></FONT>&#9;<FONT SIZE=3>It's leapt in a children's game</P>

+<B><P>&#9;32</B></FONT>&#9;<FONT SIZE=3>Ar follower</P>

+<B><P>&#9;34</B></FONT>&#9;<FONT SIZE=3>Lions or Tigers or Bears (oh my!)</P>

+<B><P>&#9;36</B></FONT>&#9;<FONT SIZE=3>Gershwin brother</P>

+<B><P>&#9;37</B></FONT>&#9;<FONT SIZE=3>Comes</P>

+<B><P>&#9;41</B></FONT>&#9;<FONT SIZE=3>A sight for a sailor's sore eyes</P>

+<B><P>&#9;43</B></FONT>&#9;<FONT SIZE=3>"O Sole ___"</P>

+<B><P>&#9;44</B></FONT>&#9;<FONT SIZE=3>Unpaved trail</P>

+<B><P>&#9;46</B></FONT>&#9;<FONT SIZE=3>Pig ___ poke</P>

+<B><P>&#9;47</B></FONT>&#9;<FONT SIZE=3>Craving</P>

+<B><P>&#9;49</B></FONT>&#9;<FONT SIZE=3>Strangle or mangle</P>

+<B><P>&#9;51</B></FONT>&#9;<FONT SIZE=3>Third smallest inert gas</P>

+<B><P>&#9;55</B></FONT>&#9;<FONT SIZE=3>A small freshwater fish</P>

+<B><P>&#9;56</B></FONT>&#9;<FONT SIZE=3>LV A.D.'s emperor</P>

+<B><P>&#9;58</B></FONT>&#9;<FONT SIZE=3>Darlene portrayer</P>

+<B><P>&#9;59</B></FONT>&#9;<FONT SIZE=3>Often-donated item</P>

+<B><P>&#9;62</B></FONT>&#9;<FONT SIZE=3>Distress signal</P>

+<B><P>&#9;64</B></FONT>&#9;<FONT SIZE=3>15-Across, to Bert</P>

+<B><P>&#9;65</B></FONT>&#9;<FONT SIZE=3>Chalupa alternatives</P>

+<B><P>&#9;67</B></FONT>&#9;<FONT SIZE=3>Devotee</P>

+<B><P>&#9;69</B></FONT>&#9;<FONT SIZE=3>Shaka and others</P>

+<B><P>&#9;70</B></FONT>&#9;<FONT SIZE=3>In an odd fashion</P>

+<B><P>&#9;71</B></FONT>&#9;<FONT SIZE=3>Swinger's sin</P>

+<B><P>&#9;72</B></FONT>&#9;<FONT SIZE=3>Andre's rival</P>

+</FONT><P>&nbsp;</P>

+<B><FONT SIZE=3><P>Down </P>

+<P>&#9;1</B></FONT>&#9;<FONT SIZE=3>Cosi fan Tutte composer</P>

+<B><P>&#9;2</B></FONT>&#9;<FONT SIZE=3>See 1-Across</P>

+<B><P>&#9;3</B></FONT>&#9;<FONT SIZE=3>Actor Mineo</P>

+<B><P>&#9;4</B></FONT>&#9;<FONT SIZE=3>Checked out</P>

+<B><P>&#9;5</B></FONT>&#9;<FONT SIZE=3>Treasury Department division</P>

+<B><P>&#9;6</B></FONT>&#9;<FONT SIZE=3>Wouldn't leave alone</P>

+<B><P>&#9;7</B></FONT>&#9;<FONT SIZE=3>MBA course</P>

+<B><P>&#9;8</B></FONT>&#9;<FONT SIZE=3>Fog</P>

+<B><P>&#9;9</B></FONT>&#9;<FONT SIZE=3>Tiger's weapon</P>

+<B><P>&#9;10</B></FONT>&#9;<FONT SIZE=3>Polio conqueror</P>

+<B><P>&#9;12</B></FONT>&#9;<FONT SIZE=3>"Stop, ___!"</P>

+<B><P>&#9;17</B></FONT>&#9;<FONT SIZE=3>Squealer healer</P>

+<B><P>&#9;19</B></FONT>&#9;<FONT SIZE=3>Skin stripe</P>

+<B><P>&#9;21</B></FONT>&#9;<FONT SIZE=3>Vier - ein</P>

+<B><P>&#9;23</B></FONT>&#9;<FONT SIZE=3>Caught, as a cold</P>

+<B><P>&#9;25</B></FONT>&#9;<FONT SIZE=3>Faced with a dilemma</P>

+<B><P>&#9;26</B></FONT>&#9;<FONT SIZE=3>"Yikes!"</P>

+<B><P>&#9;28</B></FONT>&#9;<FONT SIZE=3>Say you're coming</P>

+<B><P>&#9;30</B></FONT>&#9;<FONT SIZE=3>Rani's dress</P>

+<B><P>&#9;33</B></FONT>&#9;<FONT SIZE=3>Junction line</P>

+<B><P>&#9;35</B></FONT>&#9;<FONT SIZE=3>Verbal avian</P>

+<B><P>&#9;37</B></FONT>&#9;<FONT SIZE=3>Surrounded by</P>

+<B><P>&#9;38</B></FONT>&#9;<FONT SIZE=3>Beatles' metermaid</P>

+<B><P>&#9;39</B></FONT>&#9;<FONT SIZE=3>Typical wise guy name</P>

+<B><P>&#9;40</B></FONT>&#9;<FONT SIZE=3>Like SnO</P>

+<B><P>&#9;42</B></FONT>&#9;<FONT SIZE=3>Metallica drummer Ulrich</P>

+<B><P>&#9;45</B></FONT>&#9;<FONT SIZE=3>Get a move on</P>

+<B><P>&#9;48</B></FONT>&#9;<FONT SIZE=3>Wave unit</P>

+<B><P>&#9;50</B></FONT>&#9;<FONT SIZE=3>Tingle of the movies</P>

+<B><P>&#9;52</B></FONT>&#9;<FONT SIZE=3>Like an 18th-century room</P>

+<B><P>&#9;53</B></FONT>&#9;<FONT SIZE=3>Weaver, for one</P>

+<B><P>&#9;54</B></FONT>&#9;<FONT SIZE=3>"...___, brutish, and short"</P>

+<B><P>&#9;57</B></FONT>&#9;<FONT SIZE=3>Synonym of 63-Down</P>

+<B><P>&#9;60</B></FONT>&#9;<FONT SIZE=3>France, once</P>

+<B><P>&#9;61</B></FONT>&#9;<FONT SIZE=3>Often litigious organization</P>

+<B><P>&#9;63</B></FONT>&#9;<FONT SIZE=3>Synonym of 57-Down</P>

+<B><P>&#9;66</B></FONT>&#9;<FONT SIZE=3>Concorde, e.g.</P>

+<B><P>&#9;68</B></FONT>&#9;<FONT SIZE=3>Exist</P></DIR>

+</FONT></BODY><script type="module" src="/checkanswer.js"></script>

+</HTML>

+

+

+  </body><script type="module" src="/checkanswer.js"></script>

+  </html>

diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d968b7b69a4d50af691e5bfc84beacbcc7bff8e0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2000/2000_set5_8_Puzzle.html/index.html
@@ -0,0 +1,40 @@
+<HTML>
+<HEAD>
+<TITLE>Mystery Hunt 2000, Set 5</TITLE>
+<LINK REV=owns HREF="mailto:puzzle@mit.edu">
+</HEAD>
+
+<BODY TEXT="#303030" BGCOLOR="#FFFFFF" LINK="#330066" ALINK="#000000"
+VLINK="#000000">
+
+
+
+  <table width=100% border=0>
+  <tr><td align=left valign=top><h2>
+
+<H3>Puzzles, Set 5</H3>
+
+  </h2></td>
+  <td align=right valign=top width=300>
+<a href="../index.html">Back to hunt</a>
+  </td></tr></table>
+
+
+<BLOCKQUOTE>
+<A HREF="1/Puzzle.html">Puzzle 1</A> <A HREF="1/Solution.html">Solution 1</A><BR>
+<A HREF="2/Puzzle.html">Puzzle 2</A> <A HREF="2/Solution.html">Solution 2</A><BR>
+<A HREF="3/Puzzle.html">Puzzle 3</A> <A HREF="3/Solution.html">Solution 3</A><BR>
+<A HREF="4/Puzzle.html">Puzzle 4</A> <A HREF="4/Solution.html">Solution 4</A><BR>
+<A HREF="5/Puzzle.html">Puzzle 5</A> <A HREF="5/Solution.html">Solution 5</A><BR>
+<A HREF="6/Puzzle.html">Puzzle 6</A> <A HREF="6/Solution.html">Solution 6</A><BR>
+<A HREF="7/Puzzle.html">Puzzle 7</A> <A HREF="7/Solution.html">Solution 7</A><BR>
+<A HREF="8/Puzzle.html">Puzzle 8</A> <A HREF="8/Solution.html">Solution 8</A><BR>
+<BR>
+<A HREF="../hints/hint5.txt">Hint</A> <A HREF="../hints/solution5.txt">Hint Solution</A><BR>
+<A HREF="Meta/Solution.html">Metapuzzle Solution</A>
+</BLOCKQUOTE>
+If you participated in the Hunt, please fill out the <A
+HREF="../survey.txt">survey</A>.
+
+</BODY><script type="module" src="/checkanswer.js"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_darkblue_D_Puzzle.html/sampler_pbn.gif b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_darkblue_D_Puzzle.html/sampler_pbn.gif
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@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9f7289c76dd453542a09a93f9a3f8315b85c02d1961f9056a70739002e994644
+size 4791
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_magenta_B_Puzzle.html/05.mp3 b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_magenta_B_Puzzle.html/05.mp3
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+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_magenta_B_Puzzle.html/05.mp3
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:de804de7b34d5cd8b9b11115213b81d3f37597340aa57625ed4e6a583d573f93
+size 614516
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_orange_A_Puzzle.html/houseA.gif b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_orange_A_Puzzle.html/houseA.gif
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@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2719e228e4a4a038ee50f3fcd9904d8db6f00e47e6250c4d43236e705f2f8e6d
+size 186
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..9e2fad2d8539f8d394380962844cb045e6bea278
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/Puzzle.html
@@ -0,0 +1,51 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 2, Puzzle 5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 2
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/2.gif" alt="2">
+<img src="../../images/3.gif" alt="3">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+USE OF GOTHICISM CONSIDERED HARMFUL
+  </h2>
+  <blockquote><i>
+"In late '99, they called on me to fix their old COBOL programs for
+the dreaded Y2K bug.  Nobody's called me back since."  
+  </i></blockquote>
+
+<a href="73">73</a>
+<p><a href="132">132</a>
+<p><a href="180">180</a>
+<p><a href="194">194</a>
+<p><a href="198">198</a> - Looks like an image because it is one
+<p><a href="241">241</a> - All <tt>O</tt>s should be <tt>&oslash;</tt>s.
+<p><a href="600">600</a>
+<p><a href="1183">1183</a>
+<p><a href="1840">1840</a>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..b5619be8360085f8293cbb70940453ed4230eab3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_05_Puzzle.html/index.html
@@ -0,0 +1,35 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 2
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 2
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">TROPHY RATER</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="03/Puzzle.html">NATURE WALK</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">D2: THE MIGHTY DUCK KONUNDRUM</a> <a href="04/solution.html">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="05/Puzzle.html">USE OF GOTHICISM CONSIDERED HARMFUL</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="06/Puzzle.html">FIGHT CLUB</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="07/Puzzle.html">HOW TO BE A MILLIONAIRE</a> <a href="07/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..20827c34e859f460dd57c22e5d41a70368523140
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/Puzzle.html
@@ -0,0 +1,47 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 2, Puzzle 6
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 2
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/4.gif" alt="4">
+<img src="../../images/2.gif" alt="2">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+FIGHT CLUB
+
+  </h2>
+  <blockquote><i>
+
+Scary monsters unleashing! Uchu cheat, fighting champion defeating!
+
+  </i></blockquote>
+
+<img src="puzzle.gif">
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..b5619be8360085f8293cbb70940453ed4230eab3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_06_Puzzle.html/index.html
@@ -0,0 +1,35 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 2
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 2
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">TROPHY RATER</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="03/Puzzle.html">NATURE WALK</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">D2: THE MIGHTY DUCK KONUNDRUM</a> <a href="04/solution.html">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="05/Puzzle.html">USE OF GOTHICISM CONSIDERED HARMFUL</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="06/Puzzle.html">FIGHT CLUB</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="07/Puzzle.html">HOW TO BE A MILLIONAIRE</a> <a href="07/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..74639751abad1f4f399657dc870d0274afe7630e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/Puzzle.html
@@ -0,0 +1,77 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 2, Puzzle 7
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 2
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/3.gif" alt="3">
+<img src="../../images/4.gif" alt="4">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+HOW TO BE A MILLIONAIRE
+
+  </h2>
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+  That's what it said on the top of the letter you just opened.  The
+  outside of the envelope was stamped with "URGENT: Time sensitive
+  material inside!", and it seemed, much more than any of the other
+  documents you've seen so far, to be important to solve quickly.  And
+  yet, what do you find inside?  Some lousy chain letter handwritten
+  by your uncle, entering him into some crazy encrypted pyramid
+  scheme.  Unbelievable!
+
+  </i></blockquote>
+
+  <pre>
+YCNNI, FZ HCRP ELCGCA REH ECSYCBA.
+
+RNKYIWMY ZIW FRZ QC MPLCTLEM, L YISC KYRK ZIW BLNN AKLNN KPZ KI NLOK
+ZIWP ASLPLKA REH CEXIZ KYC OLECP KYLEMA LE NLOC.  KRUC AIFC KLFC IWK
+IO ZIWP QWAZ AGYCHWNC REH HI AIFCKYLEM OWE.  SCPYRSA ZIW AYIWNH MI KI
+R SRPKZ IE R OPLHRZ ELMYK.
+
+BYI UEIBA?  EIK IENZ GIWNH ZIW CEH WS YRTLEM R MIIH KLFC, QWK ZIW
+FLMYK RNAI OLEH RE LFSIPKREK GNWC CEGIHCH LE CJRGKNZ KYC ARFC BRZ RA
+KYLA FCAARMC LA.  LK FLMYK CTCE QC OIWP BIPHA NIEM, BLKY KYC OLPAK REH
+KYLPH BIPHA QCLEM SPISCP EIWEA.
+
+KYC NRB OLPF L WAC MCECPRNNZ YRA AIFC AIPK IO MCK-KIMCKYCP IE OPLHRZA,
+REH L'F AWPC ZIW BIWNH QC BCNGIFC KYCPC.  LE ORGK, L QCK KYRK LO ZIW
+FLAACH KYC SRPKZ (IP XWAK FLAACH AIFCKYLEM RK KYC SRPKZ), ZIW GIWNH
+FRUC RE RSSILEKFCEK REH QPLEM ZIWP IBE SRPKZ KI KYCF.  FZ IENZ RHTLGC
+LA KYRK ZIW PCFRLE SNCRAREK REH RTILH QWALECAANLUC VWCAKLIEA AWGY RA
+"BYCPC LA KYRK ACGPCK FCAARMC?" REH "EIB KYRK L'TC OIWEH KYC FCAARMC,
+FRZ L SNCRAC QC CJGWACH KI MI QRGU KI FZ HPWHMCPZ?"
+
+                                        ZIWPA,
+                                        PLGY WEGNC SCEEZQRMA
+  </pre>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..b5619be8360085f8293cbb70940453ed4230eab3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round2_07_Puzzle.html/index.html
@@ -0,0 +1,35 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 2
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 2
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">TROPHY RATER</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="03/Puzzle.html">NATURE WALK</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">D2: THE MIGHTY DUCK KONUNDRUM</a> <a href="04/solution.html">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="05/Puzzle.html">USE OF GOTHICISM CONSIDERED HARMFUL</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="06/Puzzle.html">FIGHT CLUB</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="07/Puzzle.html">HOW TO BE A MILLIONAIRE</a> <a href="07/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..d788864dadcd2a55ae039f448380cf544a485a85
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/Puzzle.html
@@ -0,0 +1,79 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3, Puzzle 2
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/1.gif" alt="1">
+<img src="../../images/1.gif" alt="1">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+POOR CONSTITUTION
+
+  </h2>
+  <blockquote><i>
+  Late in life, your uncle's health started to fail.  He'd often be
+  short of breath; you're starting to wonder if his brain was getting
+  any oxygen when he wrote these notes.
+  </i></blockquote>
+GNASHING SUPPORT ALGAE OKRA FAKE<br>
+RITA STY SILLY JUST<br>
+GODOT SKI PANG STRAY<br>
+GAUZE MOPE HOLLY TEN DEAD<br>
+COKE GOLF OCEAN KNELL<br>
+A STALE OTTER INCLINE<br>
+SOW BUS IFFY COLANDER<br>
+MEAD ELISE FIRM TURN<br>
+YOU ROPE ARROGANT IAN<br>
+ANTSY ATTIC LEEK TREE<br>
+HACKS POLLEN HASP OURS<br>
+WORE TAUNT SOP ACT<br>
+HAY BANDIT ONYX KALE<br>
+DIMES EGG THIN NURTURE<br>
+WIN OAT DANCE DRUMMOND<br>
+THOUGH FUSS CODA COMMA<br>
+EMERY WRYER COVE ASP HOOCHIE<br>
+LEAVER DOLL AXON<br>
+HEARSE HAND RAH MUTTER<br>
+SAD JITTERY SUM ASS<br>
+GROAN ABHOR HE AGER ALICE<br>
+HASNT BARGAINS BURN HARDEN DEEP RAN SUPPLE<br>
+SEND RIBBIT ALL JULIO FOURS<br>
+I.D. FACT HELGA SLAW<br>
+RELEARN NUMB ALLEY SASS<br>
+LENNY URAL JABBER BIRTH<br>
+DIVA RANGE ALEC ERIE WEIGH SHINS<br>
+LESS SAFE HEIR AUNT<br>
+FADER RENEW CALM PLEA<br>
+MARVEL HOUR DUCK HOSE ELL<br>
+CREE SPERM BIRD INN<br>
+ALLAH KNEE FART WHIZZED<br>
+MARRED INCHES ILL COLA WHIT<br>
+DAFFY TICK HOPPER SNEAK FILLED<br>
+EBONIES HUSK ROUGE ALBEE<br>
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..62421e3e7c48a0371cfe9670857fd4c76cb8fd32
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_02_Puzzle.html/index.html
@@ -0,0 +1,34 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">POOR CONSTITUTION</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">THE OBLIGATORY SCAVENGER HUNT</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">THE CALL OF THE WILD</a> <a href="04/Solution.txt">(solution)</a> <a href="jail2.jpg">(card)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="05/Puzzle.html">UNIVERSITY PARK</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="06/Puzzle.html">THE COMMONS</a> <a href="06/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..13f0bd5b0a15fa09d444742ce90c65e5ef49e46d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/Puzzle.html
@@ -0,0 +1,108 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3, Puzzle 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/1.gif" alt="1">
+<img src="../../images/2.gif" alt="2">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+THE OBLIGATORY SCAVENGER HUNT
+
+  </h2>
+  <blockquote><i>
+Material goods!  Collect material goods!
+
+
+  </i></blockquote>
+
+<table border=1 cellpadding=5>
+<tr align=center valign=center>
+<td width=16.67%>painted
+<td width=16.67%>polka-dotted
+<td width=16.67%>styrofoam
+<td width=16.67%>sandy
+<td width=16.67%>in the original packaging
+<td width=16.67%>wooden
+<tr align=center valign=center>
+<td>wicker
+<td>with the original receipt
+<td>tesselated
+<td>retractable
+<td>corrugated
+<td>reflective
+<tr align=center valign=center>
+<td>based on a cartoon character
+<td>containing tungsten
+<td>askew
+<td>deep-fried
+<td>illegal for a 17 year old to obtain
+<td>from Atlantic City
+<tr align=center valign=center>
+<td>crystalline
+<td>monochromatic
+<td>from any Monopoly set
+<td>tasty
+<td>caffeinated
+<td>woolen
+<tr align=center valign=center>
+<td>made by a 17 year old
+<td>chocolate
+<td>from the Diesel cafe
+<td>Vietnamese
+<td>vegan
+<td>mauve
+<tr align=center valign=center>
+<td>ceramic
+<td>liquid-filled
+<td>comically-oversized
+<td>threadbare
+<td>inscribed with a team member's name or initials
+<td>hand-sewn
+</table>
+
+<p>
+For the given grid above, you score points based on the number of
+adjectives in contiguous squares that describe an object that you
+bring to us. The formula is shown below:
+<p>
+<center>
+5*(number of contiguous squares)(number of contiguous squares - 1)
+</center>
+<p>
+Contiguous squares must share a side, not just a corner;
+there may be hollow areas inside a contiguous set of squares.
+<p>
+If you have NO item for a square it counts as -5 points.  You may use each square ONLY once.
+<p>
+In order to complete the scavenger hunt, you must earn 400 points.
+When you have completed your set of items, call us to set up an
+appointment to have your items checked.
+
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..62421e3e7c48a0371cfe9670857fd4c76cb8fd32
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_03_Puzzle.html/index.html
@@ -0,0 +1,34 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">POOR CONSTITUTION</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">THE OBLIGATORY SCAVENGER HUNT</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">THE CALL OF THE WILD</a> <a href="04/Solution.txt">(solution)</a> <a href="jail2.jpg">(card)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="05/Puzzle.html">UNIVERSITY PARK</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="06/Puzzle.html">THE COMMONS</a> <a href="06/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..b244f97b2f94d2119fba9a43601def0bdfee85be
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/Puzzle.html
@@ -0,0 +1,70 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3, Puzzle 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/3.gif" alt="3">
+<img src="../../images/1.gif" alt="1">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+CALL OF THE WILD
+  </h2>
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+"Well, this explains Uncle's annual 'board meetings' in Key West..."
+
+  </i></blockquote>
+
+<table> 
+<tr valign="middle"> <td><img src="1.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="1.2.gif" width=200> 
+<tr valign="middle"> <td><img src="2.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="2.2.gif" width=200> 
+<tr valign="middle"> <td><img src="3.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="3.2.gif" width=200> 
+<tr valign="middle"> <td><img src="4.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="4.2.gif" width=200> 
+<tr valign="middle"> <td><img src="5.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="5.2.gif" width=200> 
+<tr valign="middle"> <td><img src="6.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="6.2.gif" width=200> 
+<tr valign="middle"> <td><img src="7.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="7.2.gif" width=200> 
+<tr valign="middle"> <td><img src="8.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="8.2.gif" width=200> 
+<tr valign="middle"> <td><img src="9.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="9.2.gif" width=200> 
+<tr valign="middle"> <td><img src="10.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="10.2.gif" width=200>
+<tr valign="middle"> <td><img src="11.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="11.2.gif" width=200>
+<tr valign="middle"> <td><img src="12.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="12.2.gif" width=200>
+<tr valign="middle"> <td><img src="13.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="13.2.gif" width=200>
+<tr valign="middle"> <td><img src="14.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="14.2.gif" width=200>
+<tr valign="middle"> <td><img src="15.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="15.2.gif" width=200>
+<tr valign="middle"> <td><img src="16.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="16.2.gif" width=200>
+<tr valign="middle"> <td><img src="17.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="17.2.gif" width=200>
+<tr valign="middle"> <td><img src="18.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="18.2.gif" width=200>
+<tr valign="middle"> <td><img src="19.1.gif" width=200> <td><img src="bigplus.gif"><td>  <img src="19.2.gif" width=200>
+</table>
+
+<img src="grid.gif">
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..62421e3e7c48a0371cfe9670857fd4c76cb8fd32
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_04_Puzzle.html/index.html
@@ -0,0 +1,34 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">POOR CONSTITUTION</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">THE OBLIGATORY SCAVENGER HUNT</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">THE CALL OF THE WILD</a> <a href="04/Solution.txt">(solution)</a> <a href="jail2.jpg">(card)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="05/Puzzle.html">UNIVERSITY PARK</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="06/Puzzle.html">THE COMMONS</a> <a href="06/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..795ffc896b40bbce2ded0f5040013c6525e8665d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/Puzzle.html
@@ -0,0 +1,121 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3, Puzzle 5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/3.gif" alt="3">
+<img src="../../images/2.gif" alt="2">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+UNIVERSITY PARK
+
+  </h2>
+  <blockquote><i>
+
+  Your uncle always wanted to own a hotel at MIT.
+
+  </i></blockquote>
+
+
+<h3> Part One</h3>
+
+  Something is wrong with two of the phrases below.  The others are
+  near prominent objects, but something is wrong with two of those
+  objects, as well.  The first wrong thing clues the second wrong
+  things, which form the answer to this section.
+
+<ul>
+<li>      at high tide, on a floating platform
+<li>      BE MINE
+<li>      because of their goodness by all means
+<li>      5 Remember this parking level
+<li>      HE CANNOT BE SATISFIED
+<li>      MILLENNIUM SHUTTLE SCHEDULE
+<li>      over the Roer River These men are getting
+<li>      set an informal world's record (27 mph)
+<li>      the home of hot dog stands, shoemakers
+</ul>
+
+
+<h3> Part Two</h3>
+  Take the sidekick of the person mentioned by James Russell Lowell.
+
+<p>  Remove any of the initials of the June 1830 surveyor.
+
+<p>  Remove the first occurrence of the largest substring that is also a
+  substring in 'the place for curing fish.'
+
+<p>  Find the largest occurrence of rhenium's atomic number.  Find the
+  element nearest to this and take the symbol for the element that is
+  southeast of it on the periodic table and add it to the end of the
+  string.
+
+<p>  If the number of rivets in the giant thimble is odd, remove from
+  the string the symbol that would have the highest atomic number.  If
+  it is even, add the symbol for the element whose atomic number is the
+  same as the number of rivets to the beginning of the string.
+
+<p>  Margaret Fuller uses one word more than any other here.  If that
+  word has an even number of letters, add the state postal
+  abbreviation that is nth place on a list of states in increasing
+  order of area to the end of the string.  If it has an odd number of
+  letters, remove the reversal of the postal abbreviation for the nth
+  state on an alphabetical list of states.
+
+<p>  Subtract from the year of the Cambridge Chronicle snippet the year
+  of the most recent surveyors map of Cambridge.  Delete the letter
+  that in that position in the string.
+
+<h3> Part Three</h3>
+<center>
+FILL IN THE METABLANK AND REVERSE
+<p>
+<img src="part3.gif" alt="image - part 3 of the puzzle">
+</center>
+
+<h3> Part Four</h3>
+
+<ul>
+<li>  ADD: the last name of the animal sculptor.
+
+<li>  ADD: the symbol of the element whose atomic number is the diameter,
+  in inches, of the Princeton refractor.
+
+<li>  ADD: one of what is depicted on the head of the animal whose tracks
+  pass in front of the crab.
+
+<li>  SUBTRACT: the most common first letter among the words in the
+  inscription pointing towards the animals.
+
+<li>  SUBTRACT: the first name of the telescope maker.
+
+<li>  SUBTRACT: the first three letters of the word after "horse-shoeing".
+</ul>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..62421e3e7c48a0371cfe9670857fd4c76cb8fd32
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_05_Puzzle.html/index.html
@@ -0,0 +1,34 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">POOR CONSTITUTION</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">THE OBLIGATORY SCAVENGER HUNT</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">THE CALL OF THE WILD</a> <a href="04/Solution.txt">(solution)</a> <a href="jail2.jpg">(card)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="05/Puzzle.html">UNIVERSITY PARK</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="06/Puzzle.html">THE COMMONS</a> <a href="06/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..c108a4e124b65779b4a2a49da7901775b498cc77
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/Puzzle.html
@@ -0,0 +1,85 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3, Puzzle 6
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/5.gif" alt="5">
+<img src="../../images/1.gif" alt="1">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+THE COMMONS
+
+  </h2>
+  <blockquote><i>
+
+Sure, for the same price you could catch three movies at LSC, but all
+your favorite movies are playing at the Boston Common!
+
+  </i></blockquote>
+
+  Fresh out of prison, a retarded vampire hunter chases his prey
+  through the gritty streets of a future Los Angeles. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  Prospects of a dry future find our heroine ditching her
+  straight-laced ways, fraternizing with a local grunge-rocker, and
+  working in the phone sex industry. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  A kung-fu fighting Vietnam vet, aged prematurely, returns from the
+  dead in an unlikely form. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  Doomed to roam the earth, a pirate tries to warn his girlfriend of
+  danger in this adaptation of an underground comic. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  A wild fraternity, after moving into an old Victorian, invites the
+  whole school over for a bash. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  Trapped in a hick town, a television starlet grieves over her
+  recently lost family by inspecting the seedy underbelly of her
+  town. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  While trying to make it big in the music scene, a prostitute on Pago
+  Pago grows closer to her estranged brother. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  A rookie policewoman's actions lands a crook's gun in the possession
+  of an urban superhero often found gossiping at a Louisiana beauty
+  parlor. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  The bride of an alcoholic wharf manager raises an orphan while
+  dating a neurotic comedian. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  A former street hustler and religious convert must join the Dragons
+  of Heaven and save humanity in this comic book adaptation. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+<p>
+  A storybook princess, unable to tolerate her husband's impotence,
+  heads off to a ski resort for the holidays. <img src="smallstar.gif" align=bottom>
+<p>
+  Headed for Broadway after success on a New England stage, a band of
+  black pioneers worries about their future after graduation. <img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom><img src="smallstar.gif" align=bottom>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..62421e3e7c48a0371cfe9670857fd4c76cb8fd32
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round3_06_Puzzle.html/index.html
@@ -0,0 +1,34 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 3
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">POOR CONSTITUTION</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">THE OBLIGATORY SCAVENGER HUNT</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">THE CALL OF THE WILD</a> <a href="04/Solution.txt">(solution)</a> <a href="jail2.jpg">(card)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="05/Puzzle.html">UNIVERSITY PARK</a> <a href="05/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="06/Puzzle.html">THE COMMONS</a> <a href="06/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..f36425f18cbb287909da4237aae7aeab9ef700a5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/Puzzle.html
@@ -0,0 +1,57 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4, Puzzle 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/1.gif" alt="1">
+<img src="../../images/3.gif" alt="3">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+MUCH PAINT, MANY NUMBERS
+
+  </h2>
+  <blockquote><i>
+
+Was this how your uncle managed his trades?  "You're offering me all
+three reds and both of the blues, huh?  Let me check what I can offer
+in return..."
+
+  </i></blockquote>
+
+<p>
+<center>
+<img src="pbn.gif">
+<p>
+<img src="part2.gif">
+</center>
+
+<p>(Can't find a color printer?  Trying using <a href="pbn.ps">this</a>
+and <a href="http://www.adobe.com/products/postscript/pdfs/PLRM.pdf">this</a>.)
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..c491b799d7e4aed74ca7acd9331fee0f7c2a9e8c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="04/Puzzle.html">MUCH PAINT, MANY NUMBERS</a> <a href="04/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="06/Puzzle.html">TO A TEE</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="08/Puzzle.html">BODY OF WORK</a> <a href="08/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_"> - <a href="__/Puzzle.html">MIXED SIGNALS</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/pbn.ps b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/pbn.ps
new file mode 100644
index 0000000000000000000000000000000000000000..2283b3b69c28f0775201510aa2db8684f42e23b0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_04_Puzzle.html/pbn.ps
@@ -0,0 +1,699 @@
+%!
+12
+dup dup scale .5 exch div setlinewidth
+/HelveticaBold findfont 1 scalefont setfont
+1 1 translate % margin
+19 0 translate % longest across clue
+
+0 1 30 {
+  30 exch moveto
+  30 19 add neg 0 rlineto
+  stroke
+} for
+0 1 30 {
+  0 moveto
+  0 30 15 add rlineto
+  stroke
+} for
+
+currentlinewidth 3 mul setlinewidth
+0 5 30 {
+  30 exch moveto
+  30 19 add neg 0 rlineto
+  stroke
+} for
+0 5 30 {
+  0 moveto
+  0 30 15 add rlineto
+  stroke
+} for
+
+/R {0.87 0.0 0.0     setrgbcolor} def
+/O {0.93 0.63 0.004  setrgbcolor} def
+/Y {0.92 0.92 0.0    setrgbcolor} def
+/G {0.52 0.80 0.19   setrgbcolor} def
+/B {0.0 0.55 0.92    setrgbcolor} def
+/P {0.43 0.16 0.65   setrgbcolor} def
+/K {0.0 0.0 0.0      setrgbcolor} def
+
+/ccshow {
+  /s exch def
+  gsave 0 0 moveto s false charpath flattenpath pathbbox grestore
+  exch 3 1 roll add 2 div neg 3 1 roll add 2 div neg exch
+  gsave rmoveto s show grestore
+} bind def
+
+.5 -.5 translate % numbers' centers now on integer grid
+
+2 neg 30 0 sub moveto
+R (3) ccshow 1 0 rmoveto
+B (2) ccshow 1 0 rmoveto
+3 neg 30 1 sub moveto
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+6 neg 30 3 sub moveto
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+6 neg 30 4 sub moveto
+R (4) ccshow 1 0 rmoveto
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+7 neg 30 5 sub moveto
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+R (1) ccshow 1 0 rmoveto
+10 neg 30 12 sub moveto
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+11 neg 30 13 sub moveto
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+P (1) ccshow 1 0 rmoveto
+B (3) ccshow 1 0 rmoveto
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+R (4) ccshow 1 0 rmoveto
+11 neg 30 14 sub moveto
+R (1) ccshow 1 0 rmoveto
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+14 neg 30 15 sub moveto
+R (1) ccshow 1 0 rmoveto
+G (3) ccshow 1 0 rmoveto
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+R (5) ccshow 0 -1 rmoveto
+showpage
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..9f2573a5a77aaaa1b1f79cec5d7de6097e6e4fed
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/Puzzle.html
@@ -0,0 +1,60 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4, Puzzle 6
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/2.gif" alt="2">
+<img src="../../images/4.gif" alt="4">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+TO A TEE
+
+  </h2>
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+
+You find a short memo in an old photo album:
+
+"NB: Give to Massachvsetts Institvte of Technology stvdents --
+vsefvl?"
+
+  </i></blockquote>
+
+
+<center>
+<table>
+<tr valign=center>
+<td><a href="puzzle-left.jpg"><img src="tn-left.jpg"></a></td>
+<td><a href="puzzle-right.jpg"><img src="tn-right.jpg"></a></td>
+</tr>
+</table>
+</center>
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..c491b799d7e4aed74ca7acd9331fee0f7c2a9e8c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_06_Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="04/Puzzle.html">MUCH PAINT, MANY NUMBERS</a> <a href="04/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="06/Puzzle.html">TO A TEE</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="08/Puzzle.html">BODY OF WORK</a> <a href="08/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_"> - <a href="__/Puzzle.html">MIXED SIGNALS</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..7cc920362aca0b34bbb24f6284de2ac9544617f3
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/Puzzle.html
@@ -0,0 +1,80 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4, Puzzle 8
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/5.gif" alt="5">
+<img src="../../images/3.gif" alt="3">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+BODY OF WORK
+
+  </h2>
+  <blockquote><i>
+"If nothing else, I hope that when I pass away, I go on record for all my
+accomplishments. The early ones are just as important as the others."
+  </i></blockquote>
+At the end of a wild wild life, you might top it off with these. Collect
+all five.<p>
+
+Thirsty on an airplane (10)<p>
+Skulk (3)<p>
+Hopeful (7)<p>
+Supporting a candidate (4)<p>
+Carrot or cucumber (6)<p>
+Alarm clock (10)<p>
+Danny Elfman work (9)<p>
+Second person (3)<p>
+The machine keeping me alive (7)<p>
+Vehicular safety device (5)<p>
+Will Smith, in Enemy of the State (7)<p>
+Tire mishap (5)<p>
+Tune about tetrahedrons (3)<p>
+Merely (4)<p>
+American currencies (6)<p>
+First child (4)<p>
+"#1 Crush" (9) <p>
+Pout (4)<p>
+Predatory grizzlies (9)<p>
+The Star-Spangled Banner (8)<p>
+Pair of dice (4)<p>
+Drawn weapons (4)<p>
+Speak up (10)<p>
+Nervous robot (5)<p>
+Disappoint (7)<p>
+Parachute component (5)<p>
+Justify your worth (8)<p>
+Scaling a fortress (7)<p>
+Oak appendages (5)<p>
+Vibration officers (7)     <p>
+One who haunts the road (10)<p>
+Between heaven and hell (5)
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..c491b799d7e4aed74ca7acd9331fee0f7c2a9e8c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4_08_Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="04/Puzzle.html">MUCH PAINT, MANY NUMBERS</a> <a href="04/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="06/Puzzle.html">TO A TEE</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="08/Puzzle.html">BODY OF WORK</a> <a href="08/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_"> - <a href="__/Puzzle.html">MIXED SIGNALS</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..0b99708edb2a002d2ee4fade0dcfff0684fb216d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/Puzzle.html
@@ -0,0 +1,98 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4, Puzzle __
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/0.gif" alt="_">
+<img src="../../images/0.gif" alt="_">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+MIXED SIGNALS
+
+  </h2>
+  <blockquote><i>
+"I never understood these modern forms of entertainment. Couldn't keep all
+the stories straight in my head. Give me a good book any day..."
+
+
+  </i></blockquote>
+Channel 091<br>
+Precious Roy gives his sister a romantic decision.<br>
+Genius tries to sell the silent treatment.<br>
+Ferguson clashes with Angel over a bottomless pool.<br>
+<p>
+Channel 146<br>
+Herman is devoured by his brother Brick.<br>
+Cat's vanity pretends to be straight to fool Louise down easy.<br>
+Andy attempts to let a polymorph.<br>
+<p>
+Channel 259<br>
+Jim visits from travelling criminals.<br>
+Lucas attempts to abolish the great white north.<br>
+Aunt Mafalda punishes a quartet of the Department of Education.<br>
+<p>
+Channel 378<br>
+The purple parrot team tries to fix Julie up with a Refrigerator Day.<br>
+Emily ruins Earl's steps of knowledge.<br>
+A sudden repossession conquers the doctor.<br>
+<p>
+Channel 407<br>
+The Inquisitor escapes with itchiness.<br>
+A blue barracuda declares that his favorite emotion is his existence.<br>
+Chester forces Dave to justify two full pendants.<br>
+<p>
+Channel 534<br>
+The crew is harassed by Merlyn's death.<br>
+Trinity gets trapped inside a tree pusher.<br>
+Monica puzzles over Better Than Life.<br>
+<p>
+Channel 620<br>
+A fork advises Dean to lose his virginity on Saint George's Island.<br>
+The British army calls inquiring to Kiki.<br>
+Emma defeats communist rebels about sexual orientation.<br>
+<p>
+Channel 713<br>
+Animal tells the tale of a rite of passage. <br>
+Robbie lusts after Geronimo's moccasins.<br>
+Olmec questions howling as Jay's former girlfriend.<br>
+<p>
+Channel 862<br>
+David and Emily goad Liz into dating surveys.<br>
+Friends learn to design their friends' erotic video.<br>
+Sir Humphrey and Bernard inadvertently watch unpopular sophomore Z.<br>
+<p>
+Channel 985<br>
+Janet helps Caleb with a Spanish soccer game.<br>
+Selena auditions to referee a mother-daughter magazine quiz.<br>
+Adam fails his school work.<br>
+
+
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..c491b799d7e4aed74ca7acd9331fee0f7c2a9e8c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round4____Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 4
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="04/Puzzle.html">MUCH PAINT, MANY NUMBERS</a> <a href="04/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/2.gif" alt="2"> <img align="middle" src="../images/4.gif" alt="4"> - <a href="06/Puzzle.html">TO A TEE</a> <a href="06/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/5.gif" alt="5"> <img align="middle" src="../images/3.gif" alt="3"> - <a href="08/Puzzle.html">BODY OF WORK</a> <a href="08/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_"> - <a href="__/Puzzle.html">MIXED SIGNALS</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..28710925b5a17f7c40adf20003b92ece26a1762f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/Puzzle.html
@@ -0,0 +1,324 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5, Puzzle 2
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/1.gif" alt="1">
+<img src="../../images/1.gif" alt="1">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+CONVENTIONAL WISDOM
+
+  </h2>
+  <blockquote><i>
+"The thing I like about bridge is that every bid has a specific meaning."
+  </i></blockquote>
+
+<p>"Sorry I'm late, boys.  There was traffic all through the greens and a
+hat-jockey-shoe pileup on Park Place.  You look lovely, Estelle."
+
+<p>"Thank you, Pennybags, you're looking good too."
+
+<p>"Oh thanks.  Admiral, walking without a cane these days I see?"
+
+<p>"You got that right!"
+
+<p>"And since you're sitting at South, Peaches, it looks like I'm partners
+with you."
+
+<p>"I'll try not to psyche bid too often, grandpa!"
+
+<p>"Don't worry about it!  Now it's my deal first?"
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center><td>-<td>1<img src="diamonds.gif"><td>-<td>2<img src="diamonds.gif">
+<tr align=center><td>-<td>2<img src="spades.gif"><td>-<td>3<img src="spades.gif">
+<tr align=center><td>4<img src="hearts.gif"><td>all pass
+</table>
+</center>
+
+<p>"Ummm, Grandpa, why did you bid four hearts there?"
+
+<p>"Oh, that was a sacrifice bid, Peaches.  I was pretty sure they were going
+to make three spades, and I had the long hearts, so I thought it might be
+worth a shot."
+
+<p>"But we went down four tricks.  Wouldn't we have been better off just
+letting them take the 90 points?"
+
+<p>"Well, no double no trouble is what I always say!"
+
+<p>"Plus the bad trump break caught your grandfather off guard."
+
+<p>"Oh, okay."
+
+<p>"Your deal, Estelle!"
+
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>      <td>  -    <td> 3NT <td>   -
+<tr align=center> <td> 4NT  <td>  all pass
+</table>        
+</center>
+
+<p>"Made it and two!  You two are lucky we didn't bid the slam."
+
+<p>"And <i>you're</i> lucky I don't have my walking stick to cosh you on the
+noggin with!"
+
+<p>"I'd like to see you try old sport!  Why didn't you bid the slam honey?"
+
+<p>"Well I had a 25-count and I couldn't tell from your bid that you actually
+had both missing aces and the spade jack."
+
+<p>"Well one day you'll learn, honey."
+
+<p>
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>      <td>     <td> 1<img src="clubs.gif">  <td>  x
+<tr align=center> <td>  1<img src="spades.gif">  <td>  -  <td>1NT  <td>  x
+<tr align=center> <td>   -  <td> 2<img src="hearts.gif">  <td>  -  <td> 4<img src="diamonds.gif">
+<tr align=center> <td>   -  <td> 4<img src="hearts.gif">  <td>  -  <td>  -
+<tr align=center> <td>   x  <td>  -  <td> 4<img src="spades.gif">  <td>  -
+<tr align=center> <td> 4NT  <td>  -  <td> 5<img src="clubs.gif">  <td> all pass
+</table>
+</center>
+
+
+<p>"Thanks for the cue bid, Admiral.  I probably wouldn't have led the
+diamond otherwise, and I think in that case the contract makes."
+
+<p>"Cue bids!  You two are trying to pull the wool over old Pennybags's
+eyes!"
+
+<p>"Nonsense old chap, if anyone's taking anyone for a ride it's you,
+doubling on a trump void!"
+
+<p>"If you can't understand my bids, I'll bid more slowly next time, you old
+coot."
+
+<p>
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>          <td>    <td>     <td> 1NT
+<tr align=center> <td>   -      <td> 3<img src="spades.gif"> <td>   - <td> 3NT
+<tr align=center> <td> all pass  
+</table>
+</center>
+<p>
+
+<p>"That's one game apiece, Pennybags.  The Admiral and I are right on your
+tail!"
+
+<p>"You think that, don't you?  Moneypenny's dealing and he's feeling a
+stealing!"
+
+<p>
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>   - <td>   -   <td>2<img src="clubs.gif">  <td>  -
+<tr align=center> <td> 3NT <td>   all pass
+</table>         
+</center>
+<p>
+
+<p>"Oh!  Can somebody spell 'rubber' for the Uncle?"
+
+<p>"Never you fear, Estelle and I aren't done for the evening yet."
+
+<p>"Oh really?  Well maybe you should rub-ber head for good luck?  Maybe you
+should write yourself a rubber check cause I'm driving you broke.  Maybe
+you should hand over your admiralship to Civil War general Rubber T. Lee."
+
+<p>"All right, Pennybags.  No need to be such a card."
+
+<p>"Well I'm rubber and you're glue, and everything you say bounces off me
+and sticks to you."
+
+<p>"Stop it."
+
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>     <td>   -  <td> 1<img src="diamonds.gif">  <td>  -
+<tr align=center> <td>  1<img src="hearts.gif"> <td>   -  <td>1NT  <td>  x
+<tr align=center> <td>  3<img src="diamonds.gif"> <td>  all pass
+</table>
+</center>
+
+<p>"Nicely played, Peaches."
+
+<p>"Thanks.  I had to take a guess on letting the king of spades ride around,
+but I figured the Admiral's double marked him for the ace and not you."
+
+<p>"And I had it indeed!  Capital play, young lady.  You've really taken to
+the game."
+
+<p>"And my granddaughter's fine play has given us another hefty
+partscore.  Why don't you two just pack it in now?"
+
+
+<p><center><table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>     <td>      <td>  -   <td>1<img src="clubs.gif">
+<tr align=center> <td>   - <td>  1<img src="hearts.gif">  <td>  -   <td>1<img src="spades.gif">
+<tr align=center> <td>   - <td> 1NT  <td>  x   <td>xx
+<tr align=center> <td>   - <td>  2<img src="hearts.gif">  <td>  -   <td>3<img src="diamonds.gif">
+<tr align=center> <td>   - <td>  4<img src="hearts.gif">  <td>  -   <td> -
+<tr align=center> <td>   x <td>    all pass    
+</table>
+</center>
+<p>
+
+"Grampa, why did you double them?  You had the four-six of trump and a
+side jack!"
+
+<p>"Well, you doubled them before, I figured you had something to set them
+with."
+
+<p>"Grampa!  I doubled 'cause they were in no trump and I had six diamond
+tricks cold."
+
+<p>"Well they didn't turn out to be so cold, did they now?"
+
+<p>"But they weren't in..."
+
+<p>"No buts about it, young lady.  If you want to play with the adults,
+you'll have to learn to double a little less capriciously."
+
+<p>"In all fairness, Penny, she did have all the diamond honors that were
+worthless with my void."
+
+<p>"In all fairness, you and Captain Queeg can go read Rubberstiltsken."
+
+<p>
+
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>      <td>     <td>     <td>  -
+<tr align=center> <td>  1<img src="clubs.gif">  <td> 1<img src="hearts.gif">  <td>  x  <td>  -
+<tr align=center> <td> 1NT  <td>  x  <td> xx  <td> 2<img src="hearts.gif">
+<tr align=center> <td>  3<img src="clubs.gif">  <td>  -  <td> 4<img src="spades.gif">  <td> all pass
+</table>
+</center>
+<p>
+"And that's a game for the good guys.  One game apiece, and we know who
+won the rubber last time we were in that situation."
+
+<p>"Yes, we do.  Anyways, how's that Enron thing going for you?"
+
+<p>"SCOOOOOOOOOREBOOOOOOOOOOARD.   SCOOOOOOOOOOOOREBOOOOOOOOOARD."
+
+<p>"Excuse me, what?"
+
+<p>"He's pointing at the scoresheet, Admiral.  I think he's reminding us that
+they have a rubber and we don't."
+
+<p>"Uh...  Indeed he is."
+
+
+<p>
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center>  <td> 1<img src="clubs.gif">  <td>  - <td>  1<img src="hearts.gif">  <td>  x
+<tr align=center>  <td> 2<img src="clubs.gif">  <td> 2<img src="spades.gif"> <td>   x  <td>  -
+<tr align=center>  <td> 3<img src="spades.gif">  <td>  x <td> 3NT  <td>  -
+<tr align=center>  <td> 4NT  <td>  all pass
+</table>
+</center>
+
+<p>"Grampa, why did you bid four no trump???  We made three and that would
+have been game!"
+
+<p>"You think I about care about game?  The only game I care about is the
+game that the Modern Major-General and Estella who needs her groove back
+don't got.  You know that movie 'He Got Game'?  Well it wasn't written
+about this partnership!"
+
+<p>"All right, you know that's really quite enough of that,
+Pennybags.  You're setting a terrible example for young Peaches here."
+
+<p>"Oh, so I should be setting her the example of how to lose at bridge and
+in life, like you?"
+
+<p>"That's not even fair - we set you the last hand!  And because of your
+moronic bid, if I may be blunt."
+
+<p>"SCOOOOOOOOOOOOOOREBOOOOOOOOOOOOARD...  SCOOOOOOOOOOOOOOREBOOOOOOOARD..."
+
+<p>
+<center>
+<table width=35%>
+<tr><th width=25%>N<th width=25%>E<th width=25%>S<th width=25%>W
+<tr align=center> <td>     <td>  1<img src="clubs.gif"> <td>   x  <td> xx
+<tr align=center> <td>  1<img src="diamonds.gif"> <td>   - <td> 2NT  <td>  -
+<tr align=center> <td>  3<img src="diamonds.gif"> <td>   - <td>  3<img src="hearts.gif">  <td>  -
+<tr align=center> <td> 5NT <td>   all pass
+</table>
+</center>
+
+<p>"All right, Pennybags.  What possible reasoning could you have had for
+that last bid?"
+
+<p>"I'll tell you the reason.  You don't have the leadership to get a hundred
+lemmings off a cliff, and your partner's a spinster who couldn't pay me
+all the money I already have to marry her."
+
+<p>"Gasp!"
+
+<p>"Now that's quite enough of you and quite enough of your sorry excuse for
+cardplaying.  I'm taking my leave of you.  Can I escort you out, Estelle?"
+
+<p>"Please do.  I shall see to it that all the members of the Regency Club
+hear of this despicable evening.  I doubt you'll be brunching with them in
+the near future."
+
+<p>"Can I get a ride with you two also?  I'm embarassed to be related to
+him."
+
+<p>"Fine!  Get out of here!  I've played better card games with my two
+orangutangs!  None of you are fit to sit at the same table with a
+Pennybags!  Do you hear me??? NONE OF YOU!!!  GET OUT OF MY SIGHT!!!!!"
+
+<p>...
+
+<p>...
+
+<p>"Um, guys?  Admiral?  Estelle?  Peachy?  sigh........."
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d0fd2403ef1471e594024916b15c4ab4213e0ea0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_02_Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">CONVENTIONAL WISDOM</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">DID SOMEONE ASK FOR TRIVIA?</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/6.gif" alt="6"> - <a href="10/Puzzle.html">PASSIVE MUZZLE</a> <a href="10/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_">  - <a href="__/Puzzle.html">WIN CHRIS MORSE'S MONEY</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..6818d51354aab450fab2bc5d1ecd547e514b7568
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/Puzzle.html
@@ -0,0 +1,66 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5, Puzzle 3
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/1.gif" alt="1">
+<img src="../../images/2.gif" alt="2">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+DID SOMEONE ASK FOR TRIVIA?
+
+
+  </h2>
+  <blockquote><i>
+
+<!-- XXX Edit this part here -->
+"Oh, man, I have had it!  If I open one more drawer or book and see
+one more scrap of paper with my uncle's handwriting listing a series
+of clues, I'm going to flip out!"
+
+  </i></blockquote>
+
+  An alley on campus<p>
+  Antonius' request<p>
+  Argentinian winner for painting at the 1966 Venice Bienniale<p>
+  Button Man with (4/20) (6) (6/8) (10/12) (20)<p>
+  DENT : PREFECT :: ACCROC : _____<p>
+  Distinctive word from March 4, 1853<p>
+  Doubles in Park City scheduled for February 15th<p>
+  Giants from Scheherazade's 543rd night<p>
+  It's often flanked by an imbrex or two<p>
+  Itchy and Scratchy Land sold out of this plate<p>
+  Jacob, Ephraim, and the rest of Joseph's family<p>
+  Number 168 of their 190 Columbia Pictures shorts<p>
+  One of twelve angry men<p>
+  The ratio of stress to strain and 114381625757888867669235779976146612010218296721242362562561842935706935245733897830597123563958705058989075147599290026879543541, for example<p>
+  Translating this out of English and back again, you may get "of twenty-five" or "Gee, don't get annoyed"<p>
+  Vintners' pomace
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d0fd2403ef1471e594024916b15c4ab4213e0ea0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_03_Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">CONVENTIONAL WISDOM</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">DID SOMEONE ASK FOR TRIVIA?</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/6.gif" alt="6"> - <a href="10/Puzzle.html">PASSIVE MUZZLE</a> <a href="10/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_">  - <a href="__/Puzzle.html">WIN CHRIS MORSE'S MONEY</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/6.gif b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/6.gif
new file mode 100644
index 0000000000000000000000000000000000000000..475206aab998310ff2f9a333075211cb14e58396
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/6.gif
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:30ff3e05e8df05a1c2b17921ca3ee357580964223b9ea2ce0465ada92f25487c
+size 135
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..d98cb439476fbc677d0f9ce8c4a36151cf6132f6
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/Puzzle.html
@@ -0,0 +1,111 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5, Puzzle 10
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/4.gif" alt="4">
+<img src="../../images/6.gif" alt="6">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+PASSIVE MUZZLE
+
+  </h2>
+  <blockquote><i>
+
+"I could never hold my liquor very well, and I'll always regret that
+drunken spat I had with your aunt-- I compared her to a counterfeit
+dollar!"
+
+  </i></blockquote>
+
+<center>
+<img src="Puzzle.gif">
+<p>
+<table width=500>
+<tr valign=top>
+<td>
+<b>
+Al Gore<br>
+Barry Gibb<br>
+Brad Pitt<br>
+Burton-Conner<br>
+Cat bird<br>
+Chain store<br>
+Cherry pie<br>
+Course IV<br>
+Course VI<br>
+Course VII<br>
+Dump truck<br>
+Far East<br>
+Food chain<br>
+Funny bone<br>
+Garden hose<br>
+Gary Cole<br>
+</b>
+<td>
+<b>
+Gold Rush<br>
+Green Bay<br>
+Ground beef<br>
+Head rush<br>
+Hockey stick<br>
+Holy Ghost<br>
+Jack Benny<br>
+Knee biter<br>
+Leg cramp<br>
+Light rain<br>
+Mary Hart<br>
+Mary Kay<br>
+Mary Wickes<br>
+Phone bill<br>
+Pop star<br>
+</b>
+<td>
+<b>
+Postal carrier<br>
+Pretty soon<br>
+Rain Man<br>
+Red ant<br>
+Riding habit<br>
+Right lane<br>
+Roast beef<br>
+Sap flow<br>
+Side pocket<br>
+Spare tire<br>
+Stolen car<br>
+Stop sign<br>
+T-bone<br>
+Tang Hall<br>
+Wine cellar
+</b>
+</table>
+</center>
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d0fd2403ef1471e594024916b15c4ab4213e0ea0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5_10_Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">CONVENTIONAL WISDOM</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">DID SOMEONE ASK FOR TRIVIA?</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/6.gif" alt="6"> - <a href="10/Puzzle.html">PASSIVE MUZZLE</a> <a href="10/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_">  - <a href="__/Puzzle.html">WIN CHRIS MORSE'S MONEY</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..bf52fe8d99c592faffb106dff60784f343daeebe
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/Puzzle.html
@@ -0,0 +1,153 @@
+
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5, Puzzle __
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/0.gif" alt="_">
+<img src="../../images/0.gif" alt="_">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+WIN CHRIS MORSE'S MONEY
+
+  </h2>
+  <blockquote><i>
+
+A note's been left for you: "With all of your cousins fighting over my
+inheritance, I'm sure there must be some sort of family feud raging.
+I sure you think that breaking your concentration may put your chances
+in jeopardy, but, to tell the truth, I think you could use the break.
+I dare you-- no, I double dare you to take a small breather."
+
+  </i></blockquote>
+
+You are all invited to a trivia-based game show, Win Chris Morse's
+Money.<p>
+
+<h3>The Logistics</h3>
+
+This game will commence in Room 1-190 at 12:30am Friday night (or
+Saturday morning if you please).<p>
+
+We would love it if each team sent people to come and watch and had
+least one person play.  Our first priority is for every single team to
+have an opportunity to play our game.<p>
+
+We have made sure there are plenty of questions for the game to be
+played three separate times, so that 24 people can compete.  If there
+are more teams (or if people just want to keep playing), we will rerun
+earlier rounds.<p>
+
+<h3>The Game</h3>
+
+Eight players will begin the game.  They will be asked a series of
+questions all worth $100.  A correct answer will increase that
+individual's score by $100, and an incorrect answer will decrease that
+individual's score by $100.  The last person to answer a question
+correctly will get to choose the category for the next question.<p>
+
+At the end of this round, only the contestants with the top three
+scores will move on.  The questions in the second round will be worth
+$200 apiece.  At the end of the second round, the person with the
+highest score will continue to the final round.<p>
+
+<h3>The Final Round</h3>
+
+Now, our highest scorer will be pitted against our host in a
+head-to-head battle of wits on 8 questions.  If our host wins, you
+go home with a pat on the head, but if you beat the host by getting at
+least as many correct answers as the host, you will Win Chris Morse's
+Money.<p>
+
+The decisions of the host are final.
+
+<hr>
+If you missed the gameshow, here are the questions used in the final
+rounds... 
+
+<p>
+<h4>SET 1</h4>
+
+What former cabinet member is currently running in the Florida Gubernatorial race?
+<p>
+What does a K indicate on a baseball scorecard?
+<p>
+Copper blight aflicts what plant used to make a popular beverage? 
+<p>
+The Helter Skelter, at Coney Island's Luna Park, was what kind of attraction? 
+<p>
+What does the "I" stand for in the abbreviation NMI?
+<p>
+What mathematical constant is also known as Napier's constant, after John Napier, the mathematician who first introduced logarithms?
+<p>
+How many members of the Whig party were elected President of the US?
+<p>
+Which way does the head face on the front of a U.S. dime, nickel or quarter?
+
+<h4>SET 2</h4>
+
+What now-common type of election was first held in Wisconsin in 1903?
+<p>
+What American coin is worth two bits?
+<p>
+What is the most common word in spoken English that contains an "F"?
+<p>
+Behind Wheel of Fortune, what is the second-most-watched game show in history?
+<p>
+Messenger, transfer, and ribosomal are the three forms of what?
+<p>
+During his rookie season with the Steelers, Kordell Stewart played 
+quarterback, wide receiver, punter and what other offensive position? 
+<p>
+What song from "Chorus Line" includes the lyric: "She walks into a room/And 
+you know/She's uncommonly rare, very unique/peripatetic, poetic and chic"? 
+<p>
+In music, what term is used to described the reappearance of the theme, but 
+backwards?
+
+<h4>SET 3</h4>
+
+What character did Barbara Eden portray on television from 1965 to 1970?
+<p>
+What abbreviation is used as a secular alternative to A.D., as in Anno Domini?
+<p>
+Billy West provided the voice for what animated chihuahua?
+<p>
+Which Shakespeare adaptation was recently released after being shelved by Miramax due to the Columbine shootings?
+<p>
+What Major League Soccer team plays its home games at RFK Stadium?
+<p>
+In proofreading, what is the meaning of a mark shaped like a lowercase gamma?
+<p>
+What 1990's television show starred Sela Ward and Swoozie Kurtz?
+<p>
+What Pearl Jam song repeats the lyrics "The picture kept will remind me"?
+
+
+  </body><script type="module" src="/checkanswer.js"></script>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..d0fd2403ef1471e594024916b15c4ab4213e0ea0
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round5____Puzzle.html/index.html
@@ -0,0 +1,33 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 5
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 5
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="02/Puzzle.html">CONVENTIONAL WISDOM</a> <a href="02/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/1.gif" alt="1"> <img align="middle" src="../images/2.gif" alt="2"> - <a href="03/Puzzle.html">DID SOMEONE ASK FOR TRIVIA?</a> <a href="03/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/4.gif" alt="4"> <img align="middle" src="../images/6.gif" alt="6"> - <a href="10/Puzzle.html">PASSIVE MUZZLE</a> <a href="10/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/0.gif" alt="_"> <img align="middle" src="../images/0.gif" alt="_">  - <a href="__/Puzzle.html">WIN CHRIS MORSE'S MONEY</a> <a href="__/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/Puzzle.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/Puzzle.html
new file mode 100644
index 0000000000000000000000000000000000000000..19684ab58fc6b17c9bff089a631b7a112f47a2f4
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/Puzzle.html
@@ -0,0 +1,77 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 6, Puzzle 4
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="25%">
+
+<!-- XXX Edit this part here -->
+Round 6
+
+  </td>
+  <td align=center valign=center width="50%">
+
+<!-- XXX Tivol will edit this part -->
+<img src="../../images/3.gif" alt="3">
+<img src="../../images/1.gif" alt="1">
+
+  </td>
+  <td align=right valign=center width="25%">
+  <a href="../index.html">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+  <h2>
+
+<!-- XXX Edit this part here -->
+X-RAY VISION
+
+  </h2>
+  <blockquote><i>
+
+"Sometimes my business competitors would try to trick me into making
+shoddy deals, but I could see right through their ploys."
+
+  </i></blockquote>
+
+17.47934<br>
+1.83594<br>
+82.576<br>
+12.649<br>
+59.31824<br>
+7.64943<br>
+63.0005<br>
+48.697<br>
+<p><br>
+26.0955<br>
+8.90529<br>
+13.3953<br>
+69.310<br>
+11.7262<br>
+25.2713<br>
+<p><br>
+1.48670<br>
+15.8357<br>
+5.94671<br>
+41.5422<br>
+4.0906<br>
+57.532<br>
+<p><br>
+63.234<br>
+24.2097<br>
+83.78<br>
+33.624<br>
+<p><br>
+74.9694<br>
+22.16292<br>
+97.47<br>
+</body><script type="module" src="/checkanswer.js"></script>
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..fd30ca532f19e7237200aff8554fc24915fcc16c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2002/2002_round6_04_Puzzle.html/index.html
@@ -0,0 +1,32 @@
+  <html>
+
+  <head>
+  <title>
+
+Mystery Hunt 2002, Round 6
+
+  </title>
+  </head>
+
+  <body text=#303030 bgcolor=#ffffff link=#330066 alink=#000000 vlink=#000000>
+
+  <table width=100% border=0 cellspacing=0>
+  <tr bgcolor=silver>
+  <td align=left valign=center width="50%">
+
+<!-- XXX Edit this part here -->
+Round 6
+
+  </td>
+  <td align=right valign=center width="50%">
+  <a href="..">2002 MIT Mystery Hunt</a>
+  </td></tr></table>
+
+<p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/1.gif" alt="1"> - <a href="04/Puzzle.html">X-RAY VISION</a> <a href="04/Solution.txt">(solution)</a><p>
+<img align="middle" src="../images/3.gif" alt="3"> <img align="middle" src="../images/5.gif" alt="5"> - <a href="08/Puzzle.html">GRAPE CLUSTERBOMB</a> <a href="08/Solution.txt">(solution)</a> <a href="08/panel.gif">(panel)</a><p>
+<img align="middle" src="../images/6.gif" alt="6"> <img align="middle" src="../images/6.gif" alt="6"> - <a href="12/Puzzle.html">NICE RACK</a> <a href="12/Solution.txt">(solution)</a><p>
+
+
+  </body>
+  </html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/a-bee-in-ones-bonnet.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/a-bee-in-ones-bonnet.html
new file mode 100644
index 0000000000000000000000000000000000000000..12736de239b484484c8566e7be3388f17e84942d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/a-bee-in-ones-bonnet.html
@@ -0,0 +1,121 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="Lance Nathan">
+   <META NAME="GENERATOR" CONTENT="me typing damnit">
+   <TITLE>Shop</TITLE>
+</HEAD>
+<BODY BGCOLOR="#ffffff">
+
+<h2>R Puzzle: Shop</h2>
+<h3>concept by Matthew Wulf, grid by Francis Heaney</h3>
+
+<p>
+
+Hints:
+
+<p>
+
+<ol>
+<li>Many of the answers have a common trait.</li>
+<li>You will need to transform some answers to get them into the grid.</li>
+<li>[If they still can't get it, maybe answer any question with "OK", "I see"
+or something like that slowly and deliberately several times.  Other than
+that I'm not sure how to hint for this--thoughts?]</li>
+</ol>
+
+<p>
+
+Answer:
+
+<p>
+
+A good number of the answers should be entered into the grid as sequences of letters (and a few numbers) that are read aloud to get the actual word (e.g., CD = seedy).
+
+<p>
+
+The answers are:
+
+<p>
+
+<table align="center" border="0" cellspacing="8" cellpadding="0">
+<tr valign="top"> 
+<td><b>ACROSS</b><br>
+<ol>
+<li value="1">Verbal</li>
+<li value="7">disbar</li>
+<li value="13">noters</li>
+<li value="14">October</li>
+<li value="16">XS (excess)</li>
+<li value="17">LMN8 (eliminate)</li>
+<li value="19">AG (Agee)</li>
+<li value="20">at</li>
+<li value="21">KC (Casey)</li>
+<li value="23">PNO (piano)</li>
+<li value="25">GO (Geo)</li>
+<li value="26">EZ (easy)</li>
+<li value="28">LE (Ellie)</li>
+<li value="29">MT (empty)</li>
+<li value="30">DD (Dee Dee)</li>
+<li value="31">DVS (devious)</li>
+<li value="32">IR (ire)</li>
+<li value="33">TO (tio)</li>
+<li value="35">LS (Ellis)</li>
+<li value="36">IO (I owe)</li>
+<li value="37">UN (Ewan)</li>
+<li value="38">4N (foreign)</li>
+<li value="39">SA (essay)</li>
+<li value="40">BDI (beady eye)</li>
+<li value="42">CNMNE (sea anemone)</li>
+<li value="44">UC (you see)</li>
+<li value="45">ON (Owen)</li>
+<li value="46">KN (cayenne)</li>
+<li value="47">base</li>
+</ol></td>
+<td><b>DOWN</b><br>
+<ol>
+<li value="1">VNSNV (Venus Envy)</li>
+<li value="2">Eo</li>
+<li value="3">RT (arty)</li>
+<li value="4">Belgian</li>
+<li value="5">armor</li>
+<li value="6">LSN (Ellison)</li>
+<li value="7">doges</li>
+<li value="8">IC (icy)</li>
+<li value="9">stamina</li>
+<li value="10">bottoms</li>
+<li value="11">AB (Abie)</li>
+<li value="12">RE (Ari)</li>
+<li value="15">RKDN (Arcadian)</li>
+<li value="16">XPDNC (expediency)</li>
+<li value="18">8E (eighty)</li>
+<li value="19">all in</li>
+<li value="22">CD (seedy)</li>
+<li value="24">OS</li>
+<li value="27">ZT (ziti)</li>
+<li value="34">OB (Obie)</li>
+<li value="37">UE (U-ie)</li>
+<li value="38">4U (for you)</li>
+<li value="39">SO (Esso)</li>
+<li value="41">DK (decay)</li>
+<li value="42">CB (Seabee)</li>
+<li value="43">NE (any)</li>
+</ol>
+</tr>
+</table>
+
+<p>
+
+The completed grid is:
+
+<p>
+
+<center><img src="shop.gif"></center>
+
+<p>
+
+The image of the completed grid spells out FND.  Pronouncing the letters as above produces the answer: EFFENDI.
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/all-r.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/all-r.html
new file mode 100644
index 0000000000000000000000000000000000000000..a4a225c61d7bbbae92786c9c1d1b09348961e52c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/all-r.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>ACMECorp: Shortcuts to R puzzles</TITLE>
+<!---<BASE HREF="">--->
+</HEAD>
+<BODY BGCOLOR="CCCCCC" TEXT="#666666"><FONT FACE="helvetica">
+<h1>Shortcuts to R puzzles</h2>
+<ul>
+<li><a href="../teamGuest/R/0_000/index.html">0.000</a> Entryway</li>
+<li><a href="../teamGuest/R/1_102/index.html">1.102</a> Corridor</li>
+<li><a href="../teamGuest/R/1_248/index.html">1.248</a> Pavilion</li>
+<li><a href="../teamGuest/R/1_534/index.html">1.534</a> Shop</li>
+<li><a href="../teamGuest/R/1_655/index.html">1.655</a> Machine Room</li>
+<li><a href="../teamGuest/R/1_853/index.html">1.853</a> Screening Room</li>
+<li><a href="../teamGuest/R/2_195/index.html">2.195</a> Lounge</li>
+<li><a href="../teamGuest/R/2_426/index.html">2.426</a> Barn</li>
+<li><a href="../teamGuest/R/2_723/index.html">2.723</a> Tea Room</li>
+<li><a href="../teamGuest/R/2_828/index.html">2.828</a> Studio</li>
+<li><a href="../teamGuest/R/3_232/index.html">3.232</a> Breezeway</li>
+<li><a href="../teamGuest/R/3_361/index.html">3.361</a> Print Room</li>
+<li><a href="../teamGuest/R/3_671/index.html">3.671</a> Cockpit</li>
+<li><a href="../teamGuest/R/3_805/index.html">3.805</a> Art Gallery</li>
+<li><a href="../teamGuest/R/4_127/index.html">4.127</a> Garage</li>
+<li><a href="../teamGuest/R/4_364/index.html">4.364</a> Ballroom</li>
+<li><a href="../teamGuest/R/4_748/index.html">4.748</a> Geological Garden</li>
+<li><a href="../teamGuest/R/4_943/index.html">4.943</a> Biological Gargen</li>
+<li><a href="../teamGuest/R/5_092/index.html">5.092</a> Cubicle</li>
+<li><a href="../teamGuest/R/5_519/index.html">5.519</a> The Hall of Chess</li>
+<li><a href="../teamGuest/R/5_815/index.html">5.815</a> Attic</li>
+<li><a href="../teamGuest/R/6_305/index.html">6.305</a> Chapel</li>
+<li><a href="../teamGuest/R/6_553/index.html">6.553</a> Chemistry Lab</li>
+<li><a href="../teamGuest/R/6_689/index.html">6.689</a> Classroom</li>
+<li><a href="../teamGuest/R/7_175/index.html">7.175</a> Gnireenigne Lab</li>
+<li><a href="../teamGuest/R/7_413/index.html">7.413</a> Break Room</li>
+<li><a href="../teamGuest/R/7_702/index.html">7.702</a> Auditorium</li>
+</ul>
+<hr>
+</FONT>
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..f3d79b59e55e7f86b0793896ee01cb963e11b9d8
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_534_index.html/index.html
@@ -0,0 +1,95 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>Shop</TITLE>
+</HEAD>
+<BODY BGCOLOR="#cccccc" text="#666666"><!--CUT--><div align=right><small><a href="../../../solutions/a-bee-in-ones-bonnet.html">(Solution)</a></small></div><!--CUT--><FONT FACE="helvetica">
+Room: 1.534
+ Exits: <a href = "../3_805/index.html">E</a>&nbsp;
+<a href = "../4_127/index.html">SE</a>&nbsp;
+<a href = "../7_413/index.html">SW</a>&nbsp;
+<a href = "../3_361/index.html">U</a>&nbsp;
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>(<a href="../../../solutions/all-r.html">Shortcuts</a>)</small><h1>1.534</h1>
+
+
+<h2>Shop</h2>
+
+<p>
+
+<em>This room is empty except for a few dozen machine parts scattered on the floor.  It looks like they should fit together, but you can't see how.  Annoyed, you kick one of the pieces, which flies across the room and knocks open a wall panel, out of which tumbles a tattered instruction manual.  On the double, you dash over and flip through it, but it has only text, not diagrams.  This leaves you feeling, uh, cross and down.</em>
+
+<p>
+<table align="center" border="0" cellspacing="8" cellpadding="0">
+<tr valign="top"> 
+<td><b>ACROSS</b><br>
+<ol>
+<li value="1"><cite>The Usual Suspects</cite> character</li>
+<li value="7">Force to quit practicing</li>
+<li value="13">They pay attention</li>
+<li value="14">Cuban Missile Crisis month</li>
+<li value="16">Overrun</li>
+<li value="17">Get rid of</li>
+<li value="19">Writer James</li>
+<li value="20">Part of an e-mail address</li>
+<li value="21">Ben or Jones</li>
+<li value="23">Gould's instrument</li>
+<li value="25">Chevy model</li>
+<li value="26">Like cake or pie</li>
+<li value="28">One of the Ewings</li>
+<li value="29">Inane</li>
+<li value="30">Name heard at press conferences circa 1993</li>
+<li value="31">Sneaky</li>
+<li value="32">Fury</li>
+<li value="33">Uncle: Sp.</li>
+<li value="35">New York island</li>
+<li value="36">"...___, so off to work..."</li>
+<li value="37">Obi-Wan portrayer</li>
+<li value="38">Exotic</li>
+<li value="39">Try</li>
+<li value="40">Part of a shifty person's visage</li>
+<li value="42">Clown fish's hideout</li>
+<li value="44">Start of an explanation</li>
+<li value="45">Wilson or Meany</li>
+<li value="46">Hot pepper</li>
+<li value="47">Facet of a diamond?</li>
+</ol>
+</td>
+<td><b>DOWN</b><br>
+<ol>
+<li value="1">Rita Mae Brown novel</li>
+<li value="2">Jackson role</li>
+<li value="3">Pretentious</li>
+<li value="4">Rene Magritte, e.g.</li>
+<li value="5">Mail</li>
+<li value="6">Author Harlan</li>
+<li value="7">Genoan honchos</li>
+<li value="8">Frigid</li>
+<li value="9">Endurance</li>
+<li value="10">Pajamas component</li>
+<li value="11">Guy who loves Rose</li>
+<li value="12">Name heard at press conferences</li>
+<li value="15">Idyllic</li>
+<li value="16">A means to an end</li>
+<li value="18">Bad year for Carter</li>
+<li value="19">Pooped</li>
+<li value="22">Less than opulently appointed</li>
+<li value="24">Jaguar, e.g.</li>
+<li value="27">Tubular pasta</li>
+<li value="34">An entertainment award</li>
+<li value="37">180 degree turn</li>
+<li value="38">Inscription on a gift</li>
+<li value="39">They had a tiger mascot</li>
+<li value="41">Entropy</li>
+<li value="42">Navy builder</li>
+<li value="43">Whichever</li>
+</ol>
+</tr>
+</table>
+
+
+</FONT>
+</BODY><script src="/checkanswer.js" type="module"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/all-r.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/all-r.html
new file mode 100644
index 0000000000000000000000000000000000000000..a4a225c61d7bbbae92786c9c1d1b09348961e52c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/all-r.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>ACMECorp: Shortcuts to R puzzles</TITLE>
+<!---<BASE HREF="">--->
+</HEAD>
+<BODY BGCOLOR="CCCCCC" TEXT="#666666"><FONT FACE="helvetica">
+<h1>Shortcuts to R puzzles</h2>
+<ul>
+<li><a href="../teamGuest/R/0_000/index.html">0.000</a> Entryway</li>
+<li><a href="../teamGuest/R/1_102/index.html">1.102</a> Corridor</li>
+<li><a href="../teamGuest/R/1_248/index.html">1.248</a> Pavilion</li>
+<li><a href="../teamGuest/R/1_534/index.html">1.534</a> Shop</li>
+<li><a href="../teamGuest/R/1_655/index.html">1.655</a> Machine Room</li>
+<li><a href="../teamGuest/R/1_853/index.html">1.853</a> Screening Room</li>
+<li><a href="../teamGuest/R/2_195/index.html">2.195</a> Lounge</li>
+<li><a href="../teamGuest/R/2_426/index.html">2.426</a> Barn</li>
+<li><a href="../teamGuest/R/2_723/index.html">2.723</a> Tea Room</li>
+<li><a href="../teamGuest/R/2_828/index.html">2.828</a> Studio</li>
+<li><a href="../teamGuest/R/3_232/index.html">3.232</a> Breezeway</li>
+<li><a href="../teamGuest/R/3_361/index.html">3.361</a> Print Room</li>
+<li><a href="../teamGuest/R/3_671/index.html">3.671</a> Cockpit</li>
+<li><a href="../teamGuest/R/3_805/index.html">3.805</a> Art Gallery</li>
+<li><a href="../teamGuest/R/4_127/index.html">4.127</a> Garage</li>
+<li><a href="../teamGuest/R/4_364/index.html">4.364</a> Ballroom</li>
+<li><a href="../teamGuest/R/4_748/index.html">4.748</a> Geological Garden</li>
+<li><a href="../teamGuest/R/4_943/index.html">4.943</a> Biological Gargen</li>
+<li><a href="../teamGuest/R/5_092/index.html">5.092</a> Cubicle</li>
+<li><a href="../teamGuest/R/5_519/index.html">5.519</a> The Hall of Chess</li>
+<li><a href="../teamGuest/R/5_815/index.html">5.815</a> Attic</li>
+<li><a href="../teamGuest/R/6_305/index.html">6.305</a> Chapel</li>
+<li><a href="../teamGuest/R/6_553/index.html">6.553</a> Chemistry Lab</li>
+<li><a href="../teamGuest/R/6_689/index.html">6.689</a> Classroom</li>
+<li><a href="../teamGuest/R/7_175/index.html">7.175</a> Gnireenigne Lab</li>
+<li><a href="../teamGuest/R/7_413/index.html">7.413</a> Break Room</li>
+<li><a href="../teamGuest/R/7_702/index.html">7.702</a> Auditorium</li>
+</ul>
+<hr>
+</FONT>
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..2ceda41f55678d03ab71d7d17e0db96a10876b49
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/index.html
@@ -0,0 +1,54 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>Machine Room</TITLE>
+</HEAD>
+<BODY BGCOLOR="#cccccc" text="#666666"><!--CUT--><div align=right><small><a href="../../../solutions/machine-room.html">(Solution)</a></small></div><!--CUT--><FONT FACE="helvetica">
+Room: 1.655
+ Exits: <a href = "../2_195/index.html">SW</a>&nbsp;
+<a href = "../7_175/index.html">NW</a>&nbsp;
+<a href = "../4_748/index.html">U</a>&nbsp;
+<a href = "../4_943/index.html">D</a>&nbsp;
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>(<a href="../../../solutions/all-r.html">Shortcuts</a>)</small><h1>1.655</h1>
+
+
+<h2>Machine Room</h2>
+
+<p>
+
+<em>It's hard to tell what this machine does, with its flashing lights and various dials and buttons, and mirrors that don't seem to reflect properly.  Clearly it represents a notable advance in some technology or another, but you can't begin to guess what.  The list tacked to the wall is no help, either; instead of instructions, it seems to be a journal of some sort.  And not a very complete one at that.</em>
+
+<p>
+
+August 1955: I drove down to the store and back again.<br>
+October 1956: I did my homework and saved the world.<br>
+April 1976: I fell off a building.<br>
+November 1957: I performed an autopsy.<br>
+August 1956: I gave a rabies shot to a poodle.<br>
+October 1957: I shot the President.
+
+<p>
+
+February 1964: I practiced my Chopin.<br>
+September 1958: I tuned my Harley.<br>
+May 1985: I rehearsed the amnesia scene.<br>
+August 1963: I heard confession.<br>
+October 1957: I helped save the galaxy.<br>
+October 1979: I danced naked.
+
+<p>
+
+June 1958: I modeled my swimsuit.<br>
+February 1974: I said a <i>bracha</i>.<br>
+November 1965: I put out a couple of contracts.<br>
+April 1969: I infiltrated a gang.<br>
+May 1974: I pulled a rabbit from a hat.<br>
+September 1953: I summoned storm clouds.<br>
+August 1953: I celebrated my birthday by just kicking back and being myself.
+
+</FONT>
+</BODY><script src="/checkanswer.js" type="module"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/machine-room.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/machine-room.html
new file mode 100644
index 0000000000000000000000000000000000000000..fa7b806a19d127b74a58bc2bc193ce9f078dc1de
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_655_index.html/machine-room.html
@@ -0,0 +1,66 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="Lance Nathan">
+   <META NAME="GENERATOR" CONTENT="me typing damnit">
+   <TITLE>Machine Room</TITLE>
+</HEAD>
+<BODY BGCOLOR="#ffffff">
+
+<h2>R Puzzle: Machine Room</h2>
+<h3>by Lance Nathan</h3>
+
+<p>
+
+The complicated machine, "mirrors that don't seem to reflect properly,"
+and the definition "dramatic advance" are clues to the TV show "Quantum
+Leap", the TV show about time traveler Samuel Beckett.
+
+<p>
+
+Each episode of the show opened with the date of the "leap."  The month/year
+pairs and descriptions of professions therefore identify particular episodes.
+(One episode, "Lee Harvey Oswald," had more than one date, but only one was in
+October 1957.  In the final episode, "Mirror Image," Sam does not leap into
+anyone, and seems to be himself.)
+
+<p>
+
+The episodes are:
+
+<p>
+
+<pre>
+Aug 8 1955:  The Color of Truth (chauffeur)
+Oct 8 1956:  Return of the Evil Leaper (college student/superhero)
+Apr 1 1976:  Disco Inferno (stuntman)
+Nov 9 1957:  Good Night, Dear Heart (coroner)
+Aug 5 1956:  How the Tess Was Won (veterinarian)
+Oct 5 1957:  Lee Harvey Oswald (Lee Harvey Oswald)
+
+Feb 6 1964:  Blind Faith (pianist)
+Sep 1 1958:  Rebel Without a Clue (biker)
+May 4 1985:  Moments to Live (soap opera star)
+Aug 19 1968: Leap of Faith (priest)
+Oct 6 1957:  Future Boy (sidekick)
+Oct 6 1979:  Private Dancer (stripper)
+
+Jun 7 1958:  Miss Deep South (beauty pageant contestant)
+Feb 2 1974:  Thou Shalt Not... (rabbi)
+Nov 8 1965:  Double Identity (Mafiosi)
+Apr 1 1969:  M.I.A. (undercover cop)
+May 9 1974:  The Great Spontini (magician)
+Sep 7 1953:  A Single Drop of Rain (rainmaker)
+Aug 8 1953:  Mirror Image (himself)</pre>
+
+<p>
+
+The episode titles are not relevant (nor are the names of the people he leaps into).
+Instead, taking the <em>days</em> of the episodes
+gives: <strong>8 8 1 9 5 5; 6 1 4 19 6 6; 7 2 8 1 9 7 8</strong>.  8/8/1955, 6/14/1966, and
+7/28/1978 were the three dates of the three-part episode about murder in
+Louisiana, and the title of those three episodes collectively is TRILOGY.
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/all-r.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/all-r.html
new file mode 100644
index 0000000000000000000000000000000000000000..a4a225c61d7bbbae92786c9c1d1b09348961e52c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/all-r.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>ACMECorp: Shortcuts to R puzzles</TITLE>
+<!---<BASE HREF="">--->
+</HEAD>
+<BODY BGCOLOR="CCCCCC" TEXT="#666666"><FONT FACE="helvetica">
+<h1>Shortcuts to R puzzles</h2>
+<ul>
+<li><a href="../teamGuest/R/0_000/index.html">0.000</a> Entryway</li>
+<li><a href="../teamGuest/R/1_102/index.html">1.102</a> Corridor</li>
+<li><a href="../teamGuest/R/1_248/index.html">1.248</a> Pavilion</li>
+<li><a href="../teamGuest/R/1_534/index.html">1.534</a> Shop</li>
+<li><a href="../teamGuest/R/1_655/index.html">1.655</a> Machine Room</li>
+<li><a href="../teamGuest/R/1_853/index.html">1.853</a> Screening Room</li>
+<li><a href="../teamGuest/R/2_195/index.html">2.195</a> Lounge</li>
+<li><a href="../teamGuest/R/2_426/index.html">2.426</a> Barn</li>
+<li><a href="../teamGuest/R/2_723/index.html">2.723</a> Tea Room</li>
+<li><a href="../teamGuest/R/2_828/index.html">2.828</a> Studio</li>
+<li><a href="../teamGuest/R/3_232/index.html">3.232</a> Breezeway</li>
+<li><a href="../teamGuest/R/3_361/index.html">3.361</a> Print Room</li>
+<li><a href="../teamGuest/R/3_671/index.html">3.671</a> Cockpit</li>
+<li><a href="../teamGuest/R/3_805/index.html">3.805</a> Art Gallery</li>
+<li><a href="../teamGuest/R/4_127/index.html">4.127</a> Garage</li>
+<li><a href="../teamGuest/R/4_364/index.html">4.364</a> Ballroom</li>
+<li><a href="../teamGuest/R/4_748/index.html">4.748</a> Geological Garden</li>
+<li><a href="../teamGuest/R/4_943/index.html">4.943</a> Biological Gargen</li>
+<li><a href="../teamGuest/R/5_092/index.html">5.092</a> Cubicle</li>
+<li><a href="../teamGuest/R/5_519/index.html">5.519</a> The Hall of Chess</li>
+<li><a href="../teamGuest/R/5_815/index.html">5.815</a> Attic</li>
+<li><a href="../teamGuest/R/6_305/index.html">6.305</a> Chapel</li>
+<li><a href="../teamGuest/R/6_553/index.html">6.553</a> Chemistry Lab</li>
+<li><a href="../teamGuest/R/6_689/index.html">6.689</a> Classroom</li>
+<li><a href="../teamGuest/R/7_175/index.html">7.175</a> Gnireenigne Lab</li>
+<li><a href="../teamGuest/R/7_413/index.html">7.413</a> Break Room</li>
+<li><a href="../teamGuest/R/7_702/index.html">7.702</a> Auditorium</li>
+</ul>
+<hr>
+</FONT>
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..15aec881c263cc49d202ccc1611267efd07b8d13
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/index.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>Screening Room</TITLE>
+</HEAD>
+<BODY BGCOLOR="#cccccc" text="#666666"><!--CUT--><div align=right><small><a href="../../../solutions/screening-room.html">(Solution)</a></small></div><!--CUT--><FONT FACE="helvetica">
+Room: 1.853
+ Exits: <a href = "../4_748/index.html">S</a>&nbsp;
+<a href = "../1_248/index.html">SW</a>&nbsp;
+<a href = "../2_426/index.html">W</a>&nbsp;
+<a href = "../3_232/index.html">NW</a>&nbsp;
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>(<a href="../../../solutions/all-r.html">Shortcuts</a>)</small><h1>1.853</h1>
+
+
+<h2>Screening Room</h2>
+
+<p>
+
+<em>Whoa.</em>
+
+
+<ul>
+<li><a href="screening-room/1.mov">1</a>
+<li><a href="screening-room/2.mov">2</a>
+<li><a href="screening-room/3.mov">3</a>
+<li><a href="screening-room/4.mov">4</a>
+<li><a href="screening-room/5.mov">5</a>
+<li><a href="screening-room/6.mov">6</a>
+<li><a href="screening-room/7.mov">7</a>
+<li><a href="screening-room/8.mov">8</a>
+<li><a href="screening-room/9.mov">9</a>
+<li><a href="screening-room/10.mov">10</a>
+<li><a href="screening-room/11.mov">11</a>
+<li><a href="screening-room/12.mov">12</a>
+<li><a href="screening-room/13.mov">13</a>
+<li><a href="screening-room/14.mov">14</a>
+<li><a href="screening-room/15.mov">15</a>
+<li><a href="screening-room/16.mov">16</a>
+<li><a href="screening-room/17.mov">17</a>
+<li><a href="screening-room/18.mov">18</a>
+<li><a href="screening-room/19.mov">19</a>
+<li><a href="screening-room/20.mov">20</a>
+<li><a href="screening-room/21.mov">21</a>
+<li><a href="screening-room/22.mov">22</a>
+<li><a href="screening-room/23.mov">23</a>
+<li><a href="screening-room/24.mov">24</a>
+<li><a href="screening-room/25.mov">25</a>
+<li><a href="screening-room/26.mov">26</a>
+<li><a href="screening-room/27.mov">27</a>
+<li><a href="screening-room/28.mov">28</a>
+<li><a href="screening-room/29.mov">29</a>
+<li><a href="screening-room/30.mov">30</a>
+
+</ul>
+
+</FONT>
+</BODY><script src="/checkanswer.js" type="module"></script>
+</HTML>
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/screening-room.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/screening-room.html
new file mode 100644
index 0000000000000000000000000000000000000000..b76c5588f15e83951b36e083c2b698eeb4b88d5e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_1_853_index.html/screening-room.html
@@ -0,0 +1,154 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="AcmeCorp">
+   <META NAME="GENERATOR" CONTENT="Document Archivists">
+   <TITLE>Screening Room</TITLE>
+</HEAD>
+<BODY BGCOLOR="#ffffff">
+
+<h2>R Puzzle: Screening Room</h2>
+<h3>by Jennifer Cunningham and Tanis O'Connor</h3>
+
+<p>
+
+The missing words from the scenes are:
+
+<p>
+
+<table border="1">
+<tr>
+   <th>Deleted Word(s)</th>
+   <th>Full Quote</th>
+   <th>Movie</th>
+</tr>
+<tr>
+   <td>Candy Dish</td>
+   <td>It's a candy dish.  Congratulations on your marriage.  Goodbye.</td>
+   <td>Feeling Minnesota</td>
+</tr><tr>
+   <td>Occasion</td>
+   <td></td>
+   <td>Much Ado About Nothing</td>
+</tr><tr>
+   <td>Martel</td>
+   <td>I mean, Martel, he is the best.</td>
+   <td>The Replacements</td>
+</tr><tr>
+   <td>Ernie</td>
+   <td>Come on, let's keep Ernie.</td>
+   <td>Sweet November</td>
+</tr><tr>
+   <td>Pig</td>
+   <td>Never called him a disgusting pig monster?</td>
+   <td>Devil's Advocate</td>
+</tr><tr>
+   <td>Experiment</td>
+   <td>I think your experiment just got a mind of its own.</td>
+   <td>Chain Reaction</td>
+</tr><tr>
+   <td>Ronnie</td>
+   <td>Dick and Ronnie know their jobs.</td>
+   <td>Point Break</td>
+</tr><tr>
+   <td>Fish</td>
+   <td>Have you done this before?  Has the fish?</td>
+   <td>Johnny Mnemonic</td>
+</tr><tr>
+   <td>Ozzy Osbourne</td>
+   <td>And like Ozzy Osbourne was repeatedly accused of corruption of the young.</td>
+   <td>Bill & Ted's Excellent Adventure</td>
+</tr><tr>
+   <td>Rides</td>
+   <td>No more harassment, no more rides, no more extortion.</td>
+   <td>Sweet November</td>
+</tr><tr>
+   <td>Maggie's</td>
+   <td>Maggie's.  We'll go to Maggie's.</td>
+   <td>Chain Reaction</td>
+</tr><tr>
+   <td>Twinkies</td>
+   <td>What's up? Did you get the twinkies?</td>
+   <td>Parenthood</td>
+</tr><tr>
+   <td>Wild Yam</td>
+   <td>What's that smell?  Wild Yam.</td>
+   <td>The Replacements</td>
+</tr><tr>
+   <td>Orphanage</td>
+   <td>When I was a kid, I used to climb up on the roof of the orphanage and make a wish on a star</td>
+   <td>A Walk In the Clouds</td>
+</tr><tr>
+   <td>Machinist</td>
+   <td>I'm a machinist, she's a physicist.</td>
+   <td>Chain Reaction</td>
+</tr><tr>
+   <td>Ignorance</td>
+   <td>I have offended you with my ignorance.</td>
+   <td>Dracula</td>
+</tr><tr>
+   <td>Ninny</td>
+   <td>Do you think I let that little ninny speak for me?</td>
+   <td>The Gift</td>
+</tr><tr>
+   <td>Uniforms</td>
+   <td>There are ten uniforms and eleven players</td>
+   <td>Hardball</td>
+</tr><tr>
+   <td>Touchdown</td>
+   <td>Touchdown for Evil Ted! We're total headbangers!</td>
+   <td>Bill & Ted's Bogus Journey</td>
+</tr><tr>
+   <td>Ear</td>
+   <td>You ate my ear, you killed your wife, you framed me, and you're mad at me for lying?</td>
+   <td>Feeling Minnesota</td>
+</tr><tr>
+   <td>Kekambas</td>
+   <td>Your handle when you call in? Kekambas.</td>
+   <td>Hardball</td>
+</tr><tr>
+   <td>Everyone</td>
+   <td>Chama, I am doing this for everyone.</td>
+   <td> Little Buddha</td>
+</tr><tr>
+   <td>Assured Trust</td>
+   <td>Assured Trust tomorrow, next day outside at the latest.</td>
+   <td>Point Break</td>
+</tr><tr>
+   <td>New Jersey</td>
+   <td>At least you didn't move to New Jersey, right?</td>
+   <td>The Watcher</td>
+</tr><tr>
+   <td>Unfairly</td>
+   <td>We died.  Most unfairly.</td>
+   <td>Bill & Ted's Bogus Journey</td>
+</tr><tr>
+   <td>Slugs</td>
+   <td>When you wake up, wipe the slugs off your face! Be ready for a new day!</td>
+   <td>My Own Private Idaho</td>
+</tr><tr>
+   <td>Chocolate</td>
+   <td>I can't go back to selling chocolate.</td>
+   <td>A Walk in the Clouds</td>
+</tr><tr>
+   <td>Edge</td>
+   <td>What did you ask me for?  Edge.  This is edge.</td>
+   <td>Sweet November</td>
+</tr><tr>
+   <td>Newark</td>
+   <td>Come on baby, all the way back to Newark.</td>
+   <td>Johnny Mnemonic</td>
+</tr><tr>
+   <td>Elevator</td>
+   <td>Was it good for you?  Yeah.  The elevator dropped.</td>
+   <td>Speed</td>
+</tr>
+</table>
+
+<p>
+
+The first letters spell COME PERFORM TWO-MINUTE KEANU SCENE.  Teams who come to HQ and perform a two-minute Keanu scene get the answer HOLLYWOOD.
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/all-r.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/all-r.html
new file mode 100644
index 0000000000000000000000000000000000000000..a4a225c61d7bbbae92786c9c1d1b09348961e52c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/all-r.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>ACMECorp: Shortcuts to R puzzles</TITLE>
+<!---<BASE HREF="">--->
+</HEAD>
+<BODY BGCOLOR="CCCCCC" TEXT="#666666"><FONT FACE="helvetica">
+<h1>Shortcuts to R puzzles</h2>
+<ul>
+<li><a href="../teamGuest/R/0_000/index.html">0.000</a> Entryway</li>
+<li><a href="../teamGuest/R/1_102/index.html">1.102</a> Corridor</li>
+<li><a href="../teamGuest/R/1_248/index.html">1.248</a> Pavilion</li>
+<li><a href="../teamGuest/R/1_534/index.html">1.534</a> Shop</li>
+<li><a href="../teamGuest/R/1_655/index.html">1.655</a> Machine Room</li>
+<li><a href="../teamGuest/R/1_853/index.html">1.853</a> Screening Room</li>
+<li><a href="../teamGuest/R/2_195/index.html">2.195</a> Lounge</li>
+<li><a href="../teamGuest/R/2_426/index.html">2.426</a> Barn</li>
+<li><a href="../teamGuest/R/2_723/index.html">2.723</a> Tea Room</li>
+<li><a href="../teamGuest/R/2_828/index.html">2.828</a> Studio</li>
+<li><a href="../teamGuest/R/3_232/index.html">3.232</a> Breezeway</li>
+<li><a href="../teamGuest/R/3_361/index.html">3.361</a> Print Room</li>
+<li><a href="../teamGuest/R/3_671/index.html">3.671</a> Cockpit</li>
+<li><a href="../teamGuest/R/3_805/index.html">3.805</a> Art Gallery</li>
+<li><a href="../teamGuest/R/4_127/index.html">4.127</a> Garage</li>
+<li><a href="../teamGuest/R/4_364/index.html">4.364</a> Ballroom</li>
+<li><a href="../teamGuest/R/4_748/index.html">4.748</a> Geological Garden</li>
+<li><a href="../teamGuest/R/4_943/index.html">4.943</a> Biological Gargen</li>
+<li><a href="../teamGuest/R/5_092/index.html">5.092</a> Cubicle</li>
+<li><a href="../teamGuest/R/5_519/index.html">5.519</a> The Hall of Chess</li>
+<li><a href="../teamGuest/R/5_815/index.html">5.815</a> Attic</li>
+<li><a href="../teamGuest/R/6_305/index.html">6.305</a> Chapel</li>
+<li><a href="../teamGuest/R/6_553/index.html">6.553</a> Chemistry Lab</li>
+<li><a href="../teamGuest/R/6_689/index.html">6.689</a> Classroom</li>
+<li><a href="../teamGuest/R/7_175/index.html">7.175</a> Gnireenigne Lab</li>
+<li><a href="../teamGuest/R/7_413/index.html">7.413</a> Break Room</li>
+<li><a href="../teamGuest/R/7_702/index.html">7.702</a> Auditorium</li>
+</ul>
+<hr>
+</FONT>
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/geek-love.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/geek-love.html
new file mode 100644
index 0000000000000000000000000000000000000000..d27cd3a7915e322f045365c6c0635b1e25a5637d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/geek-love.html
@@ -0,0 +1,41 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="Lance Nathan">
+   <META NAME="GENERATOR" CONTENT="me typing damnit">
+   <TITLE>Geek Love</TITLE>
+</HEAD>
+<BODY BGCOLOR="#ffffff">
+
+<h2>R Puzzle: Geek Love</h2>
+<h3>by Rebecca Christianson</h3>
+
+<p>
+The MIT professors descibed here are (first names being clued as such):
+
+<pre>
+Wexler
+Hubbard
+Ernst
+Noam (Chomsky)
+Devlin
+Adelson
+Yildiz
+Eddie (Fahri)
+Quinn
+Uricchio
+Anderson
+Lewin
+Steve (Pinker)
+Nepf
+Imperiali
+Grimson
+Howard
+Turkle
+</pre>
+
+The first letters spell WHEN DAY EQUALS NIGHT.  The answer is EQUINOX.
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..22861067f895ad080b3bd0529dd85a90fbf784d7
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_195_index.html/index.html
@@ -0,0 +1,179 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>Geek Love</TITLE>
+</HEAD>
+<BODY BGCOLOR="#cccccc" text="#666666"><!--CUT--><div align=right><small><a href="../../../solutions/geek-love.html">(Solution)</a></small></div><!--CUT--><FONT FACE="helvetica">
+Room: 2.195
+ Exits: <a href = "../1_655/index.html">E</a>&nbsp;
+<a href = "../6_305/index.html">SE</a>&nbsp;
+<a href = "../1_102/index.html">S</a>&nbsp;
+<a href = "../7_175/index.html">U</a>&nbsp;
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<small>(<a href="../../../solutions/all-r.html">Shortcuts</a>)</small><h1>2.195</h1>
+
+
+<h2>Lounge</h2>
+
+
+<p>
+
+<em>As you enter the room, the dim glow of lava lamps illuminates a
+love nest of silk sheets and faux fur cushions.  A wall plaque holds a
+cryptogram, which you easily translate as "Geek Loooove Lounge". On
+the floor, someone has arranged the following clippings from the
+personals section of a newspaper.</em>
+
+<p>
+
+<table border="0">
+<td width="33%">
+<font face="helvetica">
+Communicative WM seeks easy
+going romance.  Infinitives are
+optional.
+
+<hr>
+
+Sensational WM seeks woman with
+conviction. Thinking the city?
+Come to my house, I have a special
+room which will put you in
+a complicit mood.
+
+<hr>
+
+Programming Languages is my proclivity /
+I like to increase programmer productivity / 
+Am a member of an alternative fraternity / 
+Where 'Crusher' was my moniker in undergrad naivete.
+
+<hr>
+
+Fine-featured WM sending out probe;
+goal: relationship.  Politics is
+no barrier.  Let's make a move to
+merge our lives!  Get to know me
+on a first-name basis.
+
+<hr>
+
+Derive as much pleasure from
+life as possible!  WM seeks F to
+fall for him and become an
+integral part of his limited
+existence.
+
+<hr>
+
+WM seeks partner to perceive
+objects in motion.  Love is an
+illusion, so let's keep it
+light, slow and smooth.
+</font>
+</td><td width="33%">
+<font face="helvetica">
+WM with good financial sense
+seeks F for love games.  I am
+waiting to persuade you.
+
+<hr>
+
+Frequently misunderstood WM
+seeks love and a good squash
+partner.  Overcome inertia: meet
+me for lunch this week on
+Wednesday at 12:30.  I'll tell
+you my nickname.
+
+<hr>
+
+Shock the fruit flies!  I like
+radishes and rutabagas.  WM
+seeks female for learning
+experience.  Just don't call me
+a dunce.
+
+<hr>
+
+Batman seeks his Catwoman.  I
+see you in my dreams, visions
+and nightmares.  (21+ only).
+
+<hr>
+
+WM seeks companion for
+exploration of the parks and
+buildings of Boston.  I have a
+graduate degree from a west
+coast university, but I share a
+name with their rival.
+
+<hr>
+
+Stargazing WM with extensive TV
+experience seeks partner to get
+physical!  I like to do it 24
+hours a day.  I should be a
+member of LFHCfS.
+</font>
+</td><td width="33%">
+<font face="helvetica">
+Cunning, congenial WM seeks F to
+give in to those instinctual
+desires.  I want to find out how
+your mind works, and write on
+the blank slate of our
+relationship.  Call me by my
+first name.  Charter member
+LFHCfS.
+
+<hr>
+
+WF, good with children, seeks
+fluid relationship.  I like pure
+groundwater and wintertime trips
+to Hawaii.
+
+<hr>
+
+British WF seeks organic
+companion who is not intimidated
+by a woman following in the
+footsteps of MIT's first.
+
+<hr>
+
+Image obsessed, surgically precise
+WM seeks natural intelligence.
+I am surrounded by artificiality.
+Let me guide you to the commencement
+of a beautiful relationship.
+
+
+<hr>
+
+Pyromaniac WM seeks F to light
+his fire.  My down-home Kentucky
+upbringing will clear the air
+for you.
+
+<hr>
+
+Psychologist and researcher
+seeks SO to explore life on and
+off the screen and be my second
+self.  Interests include
+systems, self (and now
+technology).  Surprisingly(?)
+altruistic!
+</font>
+</table>
+
+
+
+</FONT>
+</BODY><script src="/checkanswer.js" type="module"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/all-r.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/all-r.html
new file mode 100644
index 0000000000000000000000000000000000000000..a4a225c61d7bbbae92786c9c1d1b09348961e52c
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/all-r.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="?">
+   <TITLE>ACMECorp: Shortcuts to R puzzles</TITLE>
+<!---<BASE HREF="">--->
+</HEAD>
+<BODY BGCOLOR="CCCCCC" TEXT="#666666"><FONT FACE="helvetica">
+<h1>Shortcuts to R puzzles</h2>
+<ul>
+<li><a href="../teamGuest/R/0_000/index.html">0.000</a> Entryway</li>
+<li><a href="../teamGuest/R/1_102/index.html">1.102</a> Corridor</li>
+<li><a href="../teamGuest/R/1_248/index.html">1.248</a> Pavilion</li>
+<li><a href="../teamGuest/R/1_534/index.html">1.534</a> Shop</li>
+<li><a href="../teamGuest/R/1_655/index.html">1.655</a> Machine Room</li>
+<li><a href="../teamGuest/R/1_853/index.html">1.853</a> Screening Room</li>
+<li><a href="../teamGuest/R/2_195/index.html">2.195</a> Lounge</li>
+<li><a href="../teamGuest/R/2_426/index.html">2.426</a> Barn</li>
+<li><a href="../teamGuest/R/2_723/index.html">2.723</a> Tea Room</li>
+<li><a href="../teamGuest/R/2_828/index.html">2.828</a> Studio</li>
+<li><a href="../teamGuest/R/3_232/index.html">3.232</a> Breezeway</li>
+<li><a href="../teamGuest/R/3_361/index.html">3.361</a> Print Room</li>
+<li><a href="../teamGuest/R/3_671/index.html">3.671</a> Cockpit</li>
+<li><a href="../teamGuest/R/3_805/index.html">3.805</a> Art Gallery</li>
+<li><a href="../teamGuest/R/4_127/index.html">4.127</a> Garage</li>
+<li><a href="../teamGuest/R/4_364/index.html">4.364</a> Ballroom</li>
+<li><a href="../teamGuest/R/4_748/index.html">4.748</a> Geological Garden</li>
+<li><a href="../teamGuest/R/4_943/index.html">4.943</a> Biological Gargen</li>
+<li><a href="../teamGuest/R/5_092/index.html">5.092</a> Cubicle</li>
+<li><a href="../teamGuest/R/5_519/index.html">5.519</a> The Hall of Chess</li>
+<li><a href="../teamGuest/R/5_815/index.html">5.815</a> Attic</li>
+<li><a href="../teamGuest/R/6_305/index.html">6.305</a> Chapel</li>
+<li><a href="../teamGuest/R/6_553/index.html">6.553</a> Chemistry Lab</li>
+<li><a href="../teamGuest/R/6_689/index.html">6.689</a> Classroom</li>
+<li><a href="../teamGuest/R/7_175/index.html">7.175</a> Gnireenigne Lab</li>
+<li><a href="../teamGuest/R/7_413/index.html">7.413</a> Break Room</li>
+<li><a href="../teamGuest/R/7_702/index.html">7.702</a> Auditorium</li>
+</ul>
+<hr>
+</FONT>
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/barn.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/barn.html
new file mode 100644
index 0000000000000000000000000000000000000000..8bb6cdcc587c1117b459199963eb3ca97ba3ad8e
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/barn.html
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+<div class=Section1>
+
+<p class=MsoTitle>Solution To Barn</p>
+
+<p class=MsoTitle><span style='font-size:14.0pt;mso-bidi-font-size:10.0pt;
+text-decoration:none;text-underline:none'>By Susan Glass, with lots of help
+from Jessica Wong<o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><b><i><span style='mso-bidi-font-size:
+10.0pt'>Acknowledgements:</span></i></b><i><span style='mso-bidi-font-size:
+10.0pt'> Many thanks to Jessica Wong for the large amount of work she put into
+helping construct this puzzle, and to Matt Sakai for testsolving so exhaustively.<span
+style="mso-spacerun: yes">  </span>Also thanks to caller Rob French for
+recording the audio sequences.<span style="mso-spacerun: yes">  </span>The
+checker animations came from </span><a
+href="http://members.tripod.com/~noriks/ENGLISH/English-Index2.html">Noriko
+Takahashi’s web site</a>.<span style="mso-spacerun: yes">  </span></i><i><span
+style='mso-bidi-font-size:10.0pt'>The people animations and pictures came from
+the <a
+href="http://www.remus.dti.ne.jp/~jsda/sdtext/sdtextdata/basicpro1-eng.html">Japan
+Square Dance Association</a>.<span style="mso-spacerun: yes">  </span>The call
+descriptions were assembled based on a variety of sites, all of which based
+their descriptions on the <a href="http://www.callerlab.org/">CALLERLAB</a>
+syllabus.<span style="mso-spacerun: yes">  </span>Many of the sequences were
+based on those found on <a href="http://www.ceder.net/choreodb/view.php4">Vic
+Ceder’s web site</a> .<o:p></o:p></span></i></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><b><i><span style='mso-bidi-font-size:
+10.0pt'>If you’d like more information about Square Dancing, </span></i></b><i><span
+style='mso-bidi-font-size:10.0pt'><a
+href="http://www.mit.edu/activities/tech-squares/beginners.html">Tech Squares</a>
+teaches an amazing Square Dancing course that can count as a PE credit. The
+next one starts February 4, 2003. </span></i><span style='mso-bidi-font-size:
+10.0pt'><o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>
+
+<p><i>Pictures of the pturnip team solving this puzzle can be found on the
+<a href="../photos/index.html">surveillance page</a>.</i></p>
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><span style='mso-tab-count:1'>            </span>The answer is LAME
+DUCK.<o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><span style='mso-tab-count:1'>            </span>Each dancer represents
+a bit of an 8-bit ASCII letter.<span style="mso-spacerun: yes">  </span>The
+numbers in the ending formation indicate the positions of the bits in a 64-bit
+sequence, with each group of 8 bits forming an ASCII letter.<span
+style="mso-spacerun: yes">  </span>When a dancer holds a single BFT, their bit
+flips (0 to 1, or 1 to 0).<span style="mso-spacerun: yes">  </span>Two BFTs
+cancel each other out.<o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><span style='mso-tab-count:1'>            </span>The final answer is as
+follows:<o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
+ border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>1-8<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>9-16<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>17-24<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>25-32<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>33-40<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>41-48<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>49-56<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'><span
+  style='font-size:8.5pt;font-family:Verdana'>57-64<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  1100<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  0001<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  1101<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  0101<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  0100<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0111
+  0101<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  0011<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><span style='font-size:8.5pt;font-family:Verdana'>0110
+  1011<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=144 valign=top style='width:1.5in;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>L</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>A</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>M</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>E</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>D</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>U</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>C</p>
+  </td>
+  <td width=144 valign=top style='width:1.5in;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='text-align:center'>K</p>
+  </td>
+ </tr>
+</table>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>NOTE: Digits in the final figure represent numbers <b>before</b> the
+token function.<span style="mso-spacerun: yes">  </span>Purple dots represent
+tokens.<o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>1) SEQUENCE 1<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
+ border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=248 colspan=2 valign=top style='width:185.65pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=174 valign=top style='width:130.5pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=174 valign=top style='width:130.5pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 1 right hand</p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 left hand</p>
+  </td>
+  <td width=174 valign=top style='width:130.5pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600"
+   o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f"
+   stroked="f">
+   <v:stroke joinstyle="miter"/>
+   <v:formulas>
+    <v:f eqn="if lineDrawn pixelLineWidth 0"/>
+    <v:f eqn="sum @0 1 0"/>
+    <v:f eqn="sum 0 0 @1"/>
+    <v:f eqn="prod @2 1 2"/>
+    <v:f eqn="prod @3 21600 pixelWidth"/>
+    <v:f eqn="prod @3 21600 pixelHeight"/>
+    <v:f eqn="sum @0 0 1"/>
+    <v:f eqn="prod @6 1 2"/>
+    <v:f eqn="prod @7 21600 pixelWidth"/>
+    <v:f eqn="sum @8 21600 0"/>
+    <v:f eqn="prod @7 21600 pixelHeight"/>
+    <v:f eqn="sum @10 21600 0"/>
+   </v:formulas>
+   <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/>
+   <o:lock v:ext="edit" aspectratio="t"/>
+  </v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:113.25pt;
+   height:108.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image001.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=151 height=145
+  src="./barn_files/image002.jpg" v:shapes="_x0000_i1025"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1025"
+    DrawAspect="Content" ObjectID="_1104858366">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 left<o:p></o:p></span></p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 right<o:p></o:p></span></p>
+  </td>
+  <td width=174 rowspan=4 valign=top style='width:130.5pt;border-top:none;
+  border-left:none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>(Won’t bother with pics because promenade home brings everyone back home)</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Swing your partner</p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 left &gt; Man 1 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 right &gt; Lady 4 left hand<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Allemande left</p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 1 right hand</p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 left hand<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Right and left grand</p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 right hand (first pull by) &gt; Man 3 right
+  hand (third pull by)<o:p></o:p></span></p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 left hand (second pull by) &gt; Man 3 left
+  hand (fourth pull by)<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Meet your partner and promenade home </p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left hand</p>
+  </td>
+  <td width=174 valign=top style='width:130.5pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1082" type="#_x0000_t75" style='width:110.25pt;
+   height:100.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image003.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=151 height=145
+  src="./barn_files/image004.jpg" v:shapes="_x0000_i1082"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1082"
+    DrawAspect="Content" ObjectID="_1104858367">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=155 valign=top style='width:116.6pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Heads right and left thru</p>
+  </td>
+  <td width=132 valign=top style='width:99.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 3 left hand (courtesy turn)<o:p></o:p></span></p>
+  </td>
+  <td width=116 valign=top style='width:86.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Lady 3 left hand (courtesy turn) &gt; Man 3 right
+  (couples)</span></p>
+  </td>
+  <td width=174 valign=top style='width:130.5pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1027" type="#_x0000_t75" style='width:108pt;
+   height:102pt' o:ole="">
+   <v:imagedata src="./barn_files/image005.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=151 height=141
+  src="./barn_files/image006.jpg" v:shapes="_x0000_i1027"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1027"
+    DrawAspect="Content" ObjectID="_1104858368">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>2) SEQUENCE 2<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
+ border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=296 colspan=2 valign=top style='width:221.65pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=180 valign=top style='width:135.0pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=180 valign=top style='width:135.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left hand</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right hand</p>
+  </td>
+  <td width=180 valign=top style='width:135.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1028" type="#_x0000_t75" style='width:117pt;
+   height:113.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image007.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=142
+  src="./barn_files/image008.jpg" v:shapes="_x0000_i1028"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1028"
+    DrawAspect="Content" ObjectID="_1104858370">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left hand</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right hand</p>
+  </td>
+  <td width=180 rowspan=4 valign=top style='width:135.0pt;border-top:none;
+  border-left:none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>(Won’t bother with pics because promenade home brings everyone back home)</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Swing your partner</p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 left hand<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Allemande left</p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 right hand</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 left hand<o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Right and left grand</p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 right hand (1<sup>st</sup> pull by) &gt; <span style='color:red'>Lady
+  4 right hand</span> (third pull by)</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 1 left hand (second pull by) &gt; <span style='color:red'>Lady 4 left
+  hand</span> (fourth pull by)</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Meet your partner and promenade home </p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right hand</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=180 valign=top style='width:135.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1084" type="#_x0000_t75" style='width:110.25pt;
+   height:100.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image003.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=142
+  src="./barn_files/image009.jpg" v:shapes="_x0000_i1084"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1084"
+    DrawAspect="Content" ObjectID="_1104858371">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Heads right and left thru</p>
+  </td>
+  <td width=128 valign=top style='width:95.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Lady 4 right hand</p>
+  </td>
+  <td width=168 valign=top style='width:1.75in;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Man 4 right hand</p>
+  </td>
+  <td width=180 valign=top style='width:135.0pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1030" type="#_x0000_t75" style='width:108pt;
+   height:97.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image010.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=151 height=141
+  src="./barn_files/image011.jpg" v:shapes="_x0000_i1030"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1030"
+    DrawAspect="Content" ObjectID="_1104858372">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>1) SEQUENCE 3<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
+ border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=281 colspan=4 valign=top style='width:210.85pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 3</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 4</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 right hand</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 left hand</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 right hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 left hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1031" type="#_x0000_t75" style='width:110.25pt;
+   height:101.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image012.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=147 height=135
+  src="./barn_files/image013.jpg" v:shapes="_x0000_i1031"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1031"
+    DrawAspect="Content" ObjectID="_1104858373">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1032" type="#_x0000_t75" style='width:115.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image015.jpg" v:shapes="_x0000_i1032"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1032"
+    DrawAspect="Content" ObjectID="_1104858375">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Four ladies chain</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1033" type="#_x0000_t75" style='width:109.5pt;
+   height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image016.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=125
+  src="./barn_files/image017.jpg" v:shapes="_x0000_i1033"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1033"
+    DrawAspect="Content" ObjectID="_1104858376">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads promenade ½</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 1 left hand</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 left hand</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 left hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1034" type="#_x0000_t75" style='width:110.25pt;
+   height:100.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image018.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=147 height=134
+  src="./barn_files/image019.jpg" v:shapes="_x0000_i1034"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1034"
+    DrawAspect="Content" ObjectID="_1104858377">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads come down the middle and Square thru 4</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 1 left hand</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 right hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 left hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1035" type="#_x0000_t75" style='width:102.75pt;
+   height:88.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image020.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=137 height=118
+  src="./barn_files/image021.jpg" v:shapes="_x0000_i1035"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1035"
+    DrawAspect="Content" ObjectID="_1104858378">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>All right and left thru</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 right hand <o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 right hand <o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 right &gt; Lady 3 left hand <o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 left hand <o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1036" type="#_x0000_t75" style='width:112.5pt;
+   height:90pt' o:ole="">
+   <v:imagedata src="./barn_files/image022.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=150 height=120
+  src="./barn_files/image023.jpg" v:shapes="_x0000_i1036"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1036"
+    DrawAspect="Content" ObjectID="_1104858379">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Pass thru</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 left hand <o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right hand </p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 left hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1037" type="#_x0000_t75" style='width:104.25pt;
+   height:97.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image024.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=140 height=111
+  src="./barn_files/image025.jpg" v:shapes="_x0000_i1037"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1037"
+    DrawAspect="Content" ObjectID="_1104858380">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>1) SEQUENCE 4<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;
+ border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=283 colspan=4 valign=top style='width:2.95in;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 3</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 4</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left hand</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right hand</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 left hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1038" type="#_x0000_t75" style='width:112.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image026.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=150 height=142
+  src="./barn_files/image027.jpg" v:shapes="_x0000_i1038"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1038"
+    DrawAspect="Content" ObjectID="_1104858382">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left hand</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right hand</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 left hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1039" type="#_x0000_t75" style='width:115.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image028.jpg" v:shapes="_x0000_i1039"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1039"
+    DrawAspect="Content" ObjectID="_1104858383">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Four ladies chain</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1040" type="#_x0000_t75" style='width:109.5pt;
+   height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image016.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=125
+  src="./barn_files/image029.jpg" v:shapes="_x0000_i1040"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1040"
+    DrawAspect="Content" ObjectID="_1104858384">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads promenade ½</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 right hand<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right hand</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 right hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1041" type="#_x0000_t75" style='width:110.25pt;
+   height:100.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image018.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=147 height=134
+  src="./barn_files/image030.jpg" v:shapes="_x0000_i1041"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1041"
+    DrawAspect="Content" ObjectID="_1104858385">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads come down the middle and Square thru 4</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right hand</p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 right hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left hand</p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1042" type="#_x0000_t75" style='width:102.75pt;
+   height:88.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image020.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=137 height=118
+  src="./barn_files/image031.jpg" v:shapes="_x0000_i1042"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1042"
+    DrawAspect="Content" ObjectID="_1104858386">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>All right and left thru</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1043" type="#_x0000_t75" style='width:112.5pt;
+   height:90pt' o:ole="">
+   <v:imagedata src="./barn_files/image022.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=150 height=120
+  src="./barn_files/image032.jpg" v:shapes="_x0000_i1043"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1043"
+    DrawAspect="Content" ObjectID="_1104858388">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Pass thru</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left hand</p>
+  </td>
+  <td width=69 valign=top style='width:52.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=68 valign=top style='width:51.25pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right hand</p>
+  </td>
+  <td width=75 valign=top style='width:56.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 left hand<o:p></o:p></span></p>
+  </td>
+  <td width=170 valign=top style='width:127.8pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1044" type="#_x0000_t75" style='width:105pt;
+   height:95.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image033.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=140 height=111
+  src="./barn_files/image034.jpg" v:shapes="_x0000_i1044"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1044"
+    DrawAspect="Content" ObjectID="_1104858389">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>5) SEQUENCE 5<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='margin-left:-5.8pt;
+ border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
+ mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=291 colspan=2 valign=top style='width:218.15pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 left</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1045" type="#_x0000_t75" style='width:107.25pt;
+   height:104.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image035.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=143 height=139
+  src="./barn_files/image036.jpg" v:shapes="_x0000_i1045"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1045"
+    DrawAspect="Content" ObjectID="_1104858390">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 right<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1046" type="#_x0000_t75" style='width:115.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image037.jpg" v:shapes="_x0000_i1046"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1046"
+    DrawAspect="Content" ObjectID="_1104858391">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads Square thru 4</p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 left<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1047" type="#_x0000_t75"
+   style='width:111pt;height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image038.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=148 height=125
+  src="./barn_files/image039.jpg" v:shapes="_x0000_i1047"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1047"
+    DrawAspect="Content" ObjectID="_1104858392">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>All DoSaDo</p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 right</span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1048" type="#_x0000_t75"
+   style='width:111pt;height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image038.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=148 height=125
+  src="./barn_files/image040.jpg" v:shapes="_x0000_i1048"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1048"
+    DrawAspect="Content" ObjectID="_1104858393">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Pass thru</p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 left</span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left</p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1049" type="#_x0000_t75"
+   style='width:108pt;height:94.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image041.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=144 height=126
+  src="./barn_files/image042.jpg" v:shapes="_x0000_i1049"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1049"
+    DrawAspect="Content" ObjectID="_1104858394">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Trade by</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 right <o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1050" type="#_x0000_t75" style='width:105pt;
+   height:90pt' o:ole="">
+   <v:imagedata src="./barn_files/image043.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=140 height=120
+  src="./barn_files/image044.jpg" v:shapes="_x0000_i1050"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1050"
+    DrawAspect="Content" ObjectID="_1104858396">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>All Right and left thru</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Lady 2 right (pull by)<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Lady 2 left (courtesy turn) &gt; Man 2 right
+  (couples)<o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1051" type="#_x0000_t75" style='width:105pt;
+   height:82.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image045.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=140 height=110
+  src="./barn_files/image046.jpg" v:shapes="_x0000_i1051"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1051"
+    DrawAspect="Content" ObjectID="_1104858397">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Pass thru</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Lady 2 right</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Lady 2 left</span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1052" type="#_x0000_t75" style='width:108pt;
+   height:89.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image047.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=130 height=115
+  src="./barn_files/image048.jpg" v:shapes="_x0000_i1052"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1052"
+    DrawAspect="Content" ObjectID="_1104858398">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>6) SEQUENCE 6<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='margin-left:-5.8pt;
+ border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
+ mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=291 colspan=2 valign=top style='width:218.15pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right hand</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 left hand</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1053" type="#_x0000_t75" style='width:106.5pt;
+   height:99pt' o:ole="">
+   <v:imagedata src="./barn_files/image049.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=142 height=132
+  src="./barn_files/image050.jpg" v:shapes="_x0000_i1053"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1053"
+    DrawAspect="Content" ObjectID="_1104858399">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 right hand<o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1054" type="#_x0000_t75" style='width:115.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image051.jpg" v:shapes="_x0000_i1054"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1054"
+    DrawAspect="Content" ObjectID="_1104858400">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads Square thru 4</p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 right hand</p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1055" type="#_x0000_t75"
+   style='width:111pt;height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image038.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=148 height=125
+  src="./barn_files/image052.jpg" v:shapes="_x0000_i1055"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1055"
+    DrawAspect="Content" ObjectID="_1104858401">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>All DoSaDo</p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 left<o:p></o:p></span></p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1056" type="#_x0000_t75"
+   style='width:111pt;height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image038.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=148 height=125
+  src="./barn_files/image053.jpg" v:shapes="_x0000_i1056"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1056"
+    DrawAspect="Content" ObjectID="_1104858402">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Pass thru</p>
+  <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 right</span></p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1057" type="#_x0000_t75"
+   style='width:108pt;height:94.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image041.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=144 height=126
+  src="./barn_files/image054.jpg" v:shapes="_x0000_i1057"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1057"
+    DrawAspect="Content" ObjectID="_1104858403">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Trade by</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right</p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 left<o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1058" type="#_x0000_t75" style='width:105pt;
+   height:90pt' o:ole="">
+   <v:imagedata src="./barn_files/image043.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=140 height=120
+  src="./barn_files/image055.jpg" v:shapes="_x0000_i1058"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1058"
+    DrawAspect="Content" ObjectID="_1104858405">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>All Right and left thru</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 4 right (pull by) &gt; Lady 4 left (couples)<o:p></o:p></span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 2 left (courtesy turn)<o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1059" type="#_x0000_t75" style='width:105pt;
+   height:82.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image045.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=140 height=110
+  src="./barn_files/image056.jpg" v:shapes="_x0000_i1059"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1059"
+    DrawAspect="Content" ObjectID="_1104858406">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=106 valign=top style='width:79.45pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Pass thru</p>
+  </td>
+  <td width=147 valign=top style='width:110.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 4 right</span></p>
+  </td>
+  <td width=144 valign=top style='width:107.7pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Man 2 left</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1060" type="#_x0000_t75" style='width:109.5pt;
+   height:89.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image057.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=130 height=115
+  src="./barn_files/image058.jpg" v:shapes="_x0000_i1060"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1060"
+    DrawAspect="Content" ObjectID="_1104858407">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>7) SEQUENCE 7<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='margin-left:-5.8pt;
+ border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
+ mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=277 colspan=4 valign=top style='width:207.8pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 3</p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 4</p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 left</p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right</p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1061" type="#_x0000_t75" style='width:107.25pt;
+   height:105pt' o:ole="">
+   <v:imagedata src="./barn_files/image059.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=143 height=140
+  src="./barn_files/image060.jpg" v:shapes="_x0000_i1061"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1061"
+    DrawAspect="Content" ObjectID="_1104858408">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 right<o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 right<o:p></o:p></span></p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1062" type="#_x0000_t75" style='width:115.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image061.jpg" v:shapes="_x0000_i1062"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1062"
+    DrawAspect="Content" ObjectID="_1104858409">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Circle left all the way</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 1 left<o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 right</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 right</p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 left<o:p></o:p></span></p>
+  </td>
+  <td width=169 style='width:127.1pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1063" type="#_x0000_t75"
+   style='width:115.5pt;height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image062.jpg" v:shapes="_x0000_i1063"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1063"
+    DrawAspect="Content" ObjectID="_1104858410">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Weave the ring</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 1 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 right hand</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 right hand</p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 left</p>
+  </td>
+  <td width=169 style='width:127.1pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1064" type="#_x0000_t75"
+   style='width:111.75pt;height:102pt' o:ole="">
+   <v:imagedata src="./barn_files/image063.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image064.jpg" v:shapes="_x0000_i1064"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1064"
+    DrawAspect="Content" ObjectID="_1104858411">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Right and left grand; partners form couples</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 2 left &gt; Man 3 left <o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 left <o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 left <o:p></o:p></span></p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 left<o:p></o:p></span></p>
+  </td>
+  <td width=169 style='width:127.1pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1065" type="#_x0000_t75"
+   style='width:115.5pt;height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=149 height=136
+  src="./barn_files/image065.jpg" v:shapes="_x0000_i1065"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1065"
+    DrawAspect="Content" ObjectID="_1104858412">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads promenade ½ and come down the middle</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 left</p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 right<o:p></o:p></span></p>
+  </td>
+  <td width=169 style='width:127.1pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1066" type="#_x0000_t75"
+   style='width:99.75pt;height:88.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image066.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=141 height=131
+  src="./barn_files/image067.jpg" v:shapes="_x0000_i1066"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1066"
+    DrawAspect="Content" ObjectID="_1104858414">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads Square thru 4</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 3 right<o:p></o:p></span></p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right</p>
+  </td>
+  <td width=169 style='width:127.1pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1067" type="#_x0000_t75"
+   style='width:103.5pt;height:87.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image068.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=149 height=121
+  src="./barn_files/image069.jpg" v:shapes="_x0000_i1067"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1067"
+    DrawAspect="Content" ObjectID="_1104858415">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>DoSaDo</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 3 left</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 4 right<o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 left<o:p></o:p></span></p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 right</p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1068" type="#_x0000_t75" style='width:103.5pt;
+   height:87.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image068.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=149 height=121
+  src="./barn_files/image070.jpg" v:shapes="_x0000_i1068"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1068"
+    DrawAspect="Content" ObjectID="_1104858416">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Square Thru 3</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 3 right <o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Lady 4 left</span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 3 left<o:p></o:p></span></p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Lady 4 right<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1069" type="#_x0000_t75" style='width:103.5pt;
+   height:87pt' o:ole="">
+   <v:imagedata src="./barn_files/image071.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=145 height=120
+  src="./barn_files/image072.jpg" v:shapes="_x0000_i1069"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1069"
+    DrawAspect="Content" ObjectID="_1104858417">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Trade by</p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Lady 1 left<o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 4 right<o:p></o:p></span></p>
+  </td>
+  <td width=70 valign=top style='width:52.8pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Man 3 left</p>
+  </td>
+  <td width=66 valign=top style='width:49.4pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Lady 4 right</p>
+  </td>
+  <td width=169 valign=top style='width:127.1pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1070" type="#_x0000_t75" style='width:102.75pt;
+   height:93.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image073.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=123
+  src="./barn_files/image074.jpg" v:shapes="_x0000_i1070"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1070"
+    DrawAspect="Content" ObjectID="_1104858418">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+<p style='margin:0in;margin-bottom:.0001pt'><span style='mso-bidi-font-size:
+10.0pt'>8) SEQUENCE 8<o:p></o:p></span></p>
+
+<table border=1 cellspacing=0 cellpadding=0 style='margin-left:-5.8pt;
+ border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
+ mso-padding-alt:0in 5.4pt 0in 5.4pt'>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'>Step</p>
+  </td>
+  <td width=277 colspan=2 valign=top style='width:207.95pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token Location after step ends</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border:solid windowtext .5pt;
+  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p>Formation after step ends</p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p style='margin:0in;margin-bottom:.0001pt'><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 1</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Token 2</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>START</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 4 right</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1071" type="#_x0000_t75" style='width:109.5pt;
+   height:102.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image075.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=137
+  src="./barn_files/image076.jpg" v:shapes="_x0000_i1071"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1071"
+    DrawAspect="Content" ObjectID="_1104858419">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Couples enter the square/bows </p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 4 left<o:p></o:p></span></p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 left<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1072" type="#_x0000_t75" style='width:115.5pt;
+   height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image077.jpg" v:shapes="_x0000_i1072"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1072"
+    DrawAspect="Content" ObjectID="_1104858421">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Circle left all the way</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 left</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 1 right<o:p></o:p></span></p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1073" type="#_x0000_t75"
+   style='width:115.5pt;height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image078.jpg" v:shapes="_x0000_i1073"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1073"
+    DrawAspect="Content" ObjectID="_1104858422">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Weave the ring</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 4 left<span style='color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 1 right</p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1074" type="#_x0000_t75"
+   style='width:111.75pt;height:102pt' o:ole="">
+   <v:imagedata src="./barn_files/image063.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=154 height=142
+  src="./barn_files/image079.jpg" v:shapes="_x0000_i1074"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1074"
+    DrawAspect="Content" ObjectID="_1104858423">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Right and left grand; partners form couples</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Man 2 right</span><span style='font-size:14.0pt;
+  mso-bidi-font-size:12.0pt;color:red'><o:p></o:p></span></p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><span style='color:red'>Lady 3 right<o:p></o:p></span></p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1075" type="#_x0000_t75"
+   style='width:115.5pt;height:106.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image014.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=149 height=136
+  src="./barn_files/image080.jpg" v:shapes="_x0000_i1075"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1075"
+    DrawAspect="Content" ObjectID="_1104858424">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads promenade ½ and come down the middle</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 right</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right</p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1076" type="#_x0000_t75"
+   style='width:99.75pt;height:88.5pt' o:ole="">
+   <v:imagedata src="./barn_files/image066.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=141 height=131
+  src="./barn_files/image081.jpg" v:shapes="_x0000_i1076"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1076"
+    DrawAspect="Content" ObjectID="_1104858425">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>Heads Square thru 4</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Man 2 right</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right</p>
+  </td>
+  <td width=168 style='width:126.3pt;border-top:none;border-left:none;
+  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_i1077" type="#_x0000_t75"
+   style='width:103.5pt;height:87.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image068.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=149 height=121
+  src="./barn_files/image082.jpg" v:shapes="_x0000_i1077"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1077"
+    DrawAspect="Content" ObjectID="_1104858426">
+   </o:OLEObject>
+  </xml><![endif]--><span style='mso-bidi-font-size:12.0pt'><o:p></o:p></span></p>
+  </td>
+ </tr>
+ <tr>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal>DoSaDo</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 2 left</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p>Lady 3 right</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1078" type="#_x0000_t75" style='width:103.5pt;
+   height:87.75pt' o:ole="">
+   <v:imagedata src="./barn_files/image068.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=149 height=121
+  src="./barn_files/image083.jpg" v:shapes="_x0000_i1078"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1078"
+    DrawAspect="Content" ObjectID="_1104858427">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Square Thru 3</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 2 left (second pull by)<o:p></o:p></span></p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><span style='color:red'>Man 2 right (first pull by) &gt; Lady 3 right
+  (third pull by)<o:p></o:p></span></p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1079" type="#_x0000_t75" style='width:103.5pt;
+   height:87pt' o:ole="">
+   <v:imagedata src="./barn_files/image071.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=145 height=120
+  src="./barn_files/image084.jpg" v:shapes="_x0000_i1079"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1079"
+    DrawAspect="Content" ObjectID="_1104858428">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+ <tr style='height:57.1pt'>
+  <td width=114 valign=top style='width:85.15pt;border:solid windowtext .5pt;
+  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt;
+  height:57.1pt'>
+  <p class=MsoNormal>Trade by</p>
+  </td>
+  <td width=152 valign=top style='width:113.75pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Man 2 left</p>
+  </td>
+  <td width=126 valign=top style='width:94.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p>Lady 3 right</p>
+  </td>
+  <td width=168 valign=top style='width:126.3pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt;height:57.1pt'>
+  <p><!--[if gte vml 1]><v:shape id="_x0000_i1080" type="#_x0000_t75" style='width:109.5pt;
+   height:92.25pt' o:ole="">
+   <v:imagedata src="./barn_files/image085.png" o:title=""/>
+  </v:shape><![endif]--><![if !vml]><img border=0 width=146 height=123
+  src="./barn_files/image086.jpg" v:shapes="_x0000_i1080"><![endif]><!--[if gte mso 9]><xml>
+   <o:OLEObject Type="Embed" ProgID="PBrush" ShapeID="_x0000_i1080"
+    DrawAspect="Content" ObjectID="_1104858429">
+   </o:OLEObject>
+  </xml><![endif]--></p>
+  </td>
+ </tr>
+</table>
+
+<p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p>
+
+</div>
+
+<P><SMALL>Images restored in 2010 by the archivists of Beginner's Luck.
+Thanks to Lance Nathan for providing the images (which were for a
+slightly different version of the puzzle but were close enough for easy
+modification). These images do not have the purple dots marking tokens;
+sorry. Also note that some of the bits generated by sequences 7 and 8
+appear to be incorrect.</SMALL></P>
+</body>
+
+</html>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_R_2_426_index.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
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@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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+version https://git-lfs.github.com/spec/v1
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diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-e.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-e.html/index.html
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index 0000000000000000000000000000000000000000..c7ecaa6fdae9a9b082edb903241e4a33faeae4fa
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-e.html/index.html
@@ -0,0 +1,67 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
 <head>
 <title>Training Index</title>
 <meta
+http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<style TYPE="text/css">
+.font: { helvetica,verdana,ariel; }
+</style>
+</head>
+
+<body bgcolor="#000000" text="#00aa30" link="#00aa30" vlink="#00aa30">
+<font face="helvetica,verdana,ariel">
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+<tr>
 <td><img src="images/headt.gif"></td>
 </tr>
+</table>
+
+<p>
+Welcome to the Resistance.  Before we can put you back into the field
+to start finding Adelphia's secrets, you'll need some training.
+Complete the modules as needed -- but be aware that you'll find it
+difficult to proceed without proper training.
+</p>
+
+<p>
+Be sure to <a href="how-it-works.html">read the document that explains how
+the training modules work</a>.  Then get started on your training.  And
+good luck: the Resistance is counting on you.
+</p>
+
+ <p>
+VILE
+</p>
+
+<li><a href="tp-j.html"><strong>Whoa&#151;I Know Cartography!</strong></a></li>
+<li><a href="tp-o.html"><strong>Whoa&#151;I Know Dating!</strong></a></li>
+<li><a href="tp-a.html"><strong>Whoa&#151;I Know Dialects!</strong></a></li>
+<li><a href="tp-n.html"><strong>Whoa&#151;I Know Doctoring!</strong></a></li>
+<li><a href="tp-f.html"><strong>Whoa&#151;I Know Drawing!</strong></a></li>
+<li><a href="tp-b.html"><strong>Whoa&#151;I Know Eschatology!</strong></a></li>
+<li><a href="tp-e.html"><strong>Whoa&#151;I Know Football!</strong></a></li>
+<li><a href="tp-g.html"><strong>Whoa&#151;I Know Genealogy!</strong></a></li>
+<li><a href="tp-i.html"><strong>Whoa&#151;I Know Ikebana!</strong></a></li>
+<li><a href="tp-l.html"><strong>Whoa&#151;I Know Jack!</strong></a></li>
+<li><a href="tp-p.html"><strong>Whoa&#151;I Know Kiaido!</strong></a></li>
+<li><a href="tp-q.html"><strong>Whoa&#151;I Know Knitting!</strong></a></li>
+<li><a href="tp-c.html"><strong>Whoa&#151;I Have a Migraine!</strong></a></li>
+<li><a href="tp-h.html"><strong>Whoa&#151;I Know My ABCs!</strong></a></li>
+<li><a href="tp-d.html"><strong>Whoa&#151;I Know Prestidigitation!</strong></a></li>
+<li><a href="tp-k.html"><strong>Whoa&#151;I Know Shoe-Buckling!</strong></a></li>
+<li><a href="tp-m.html"><strong>Whoa&#151;I Know Subtraction!</strong></a></li>
+<li><a href="tp-r.html"><strong>Whoa&#151;I Know Windows!</strong></a></li>
+
+</ul>
+<p><p><br>
+<a href="../index.html">Back to the index</a>
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+<tr><td align="right"><a href="hidden.html"><img src="images/hidden.gif" height="2" width="2"></a></td></tr>
+<tr>
 <td><img src="images/foott.gif"></td>
 </tr>
+</table>
+
+</font>
+</body>
+</html>
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-e.html/tp-e.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-e.html/tp-e.html
new file mode 100644
index 0000000000000000000000000000000000000000..948cd55cccd0d7bb285a35191c5a813811db45f8
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-e.html/tp-e.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="Morpheus">
+   <TITLE>Whoa--I Know Football!</TITLE>
+</HEAD>
+<BODY BGCOLOR="#000000" text="#00aa30" link="#00aa30" alink="#00aa30" vlink="#00aa30"><!--CUT--><div align=right><small><a href="../../solutions/football.html">(Solution)</a></small></div><!--CUT-->
+<font face="helvetica">
+
+<table width="100%">
+ <tr>
+  <td><img src="images/headt.jpg"></td>
+ </tr>
+</table>
+
+
+<h2>Whoa--I Know Football!</h2>
+
+<p>
+
+<em>"So this is the big one, coach--and halftime just ended.  I know we're ahead, but...did you see them?  Sure, we've got spirit, but they've got horns growing out of their heads!"</em>
+
+<p>
+
+<em>"Take your gains and losses in stride, Neo, and focus on yourself, not your opponent.  No one even thought you'd make it this far.  Just be sure to keep your playbook encrypted so the opponent doesn't know your strategy."</em>
+
+<p>
+
+KYSPYRYHNEIRWUNREELPAPFCFSHKRNLIVRTVHLSI
+
+<p><br><p>
+
+<a href="index.html">Back to the index</a>
+
+<table width="100%">
+ <tr>
+  <td><img src="images/foott.jpg"></td>
+ </tr>
+</table>
+
+</font>
+</BODY><script src="/checkanswer.js" type="module"></script>
+</HTML>
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/drawing.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/drawing.html
new file mode 100644
index 0000000000000000000000000000000000000000..23c7570b38152be424e9ca4e7c711220fb697f5d
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/drawing.html
@@ -0,0 +1,64 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="Lance Nathan">
+   <META NAME="GENERATOR" CONTENT="me typing damnit">
+   <TITLE>Whoa--I Know Drawing!</TITLE>
+</HEAD>
+<BODY BGCOLOR="#ffffff">
+
+<h2>T Puzzle: Whoa--I Know Drawing!</h2>
+<h3>by Francis Heaney (with help from Craig Swanson)</h3>
+
+<p>
+
+This puzzle features the amazing Craig Swanson, local artist and cartoonist (check out his work at <a href="http://www.perspicuity.com/">http://www.perspicuity.com/</a>!).
+
+<p>
+
+The 8 video clips are clips of Craig's hands as he draws with an etch-a-sketch.  Solvers must recreate the pictures to solve the puzzle.  This is best accomplished by watching the tape slowly, with one person imitating the left hand movements and the other person imitating the right hand movements.  Practice helps with this- but after 2-3 attempts at each picture they should average out to a decipherable version of the drawing.
+
+<p>
+
+The drawings are:
+
+<p>
+
+<ol>
+<li><a href="drawing-1.jpg">Down</a> (arrow)</li>
+<li><a href="drawing-2.jpg">Plug</a></li>
+<li><a href="drawing-3.jpg">Salt</a> (shaker)</li>
+<li><a href="drawing-4.jpg">Alpha</a> (the Greek symbol)</li>
+<li><a href="drawing-5.jpg">Heart</a></li>
+<li><a href="drawing-6.jpg">Pen</a></li>
+<li><a href="drawing-7.jpg">Block</a></li>
+<li><a href="drawing-8.jpg">Bert</a></li>
+<!---<li>Odds (1,3,5.7,9,11)</li>--->
+</ol>
+
+Each object forms the first part of an associated pair:
+
+<p>
+
+<ol>
+<li>Down & Out</li>
+<li>Plug & Play</li>
+<li>Salt & Pepper</li>
+<li>Alpha & Omega</li>
+<li>Heart & Soul</li>
+<li>Pen & Ink</li>
+<li>Block & Tackle</li>
+<li>Bert & Ernie</li>
+<!---<li>Odds & Ends (or Evens)</li>--->
+</ol>
+
+Taking the first letter of each of these complements gives you OPPOSITE.
+<p>
+Here's the sort of drawing Craig can do when he really cuts
+loose.  This portrait of Francis was done on a pocket Etch-a-Sketch,
+and was drawn so quickly that Francis didn't even know he was being
+drawn:
+<a href="drawing.jpg">Portrait</a>
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..c7ecaa6fdae9a9b082edb903241e4a33faeae4fa
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/index.html
@@ -0,0 +1,67 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
 <head>
 <title>Training Index</title>
 <meta
+http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<style TYPE="text/css">
+.font: { helvetica,verdana,ariel; }
+</style>
+</head>
+
+<body bgcolor="#000000" text="#00aa30" link="#00aa30" vlink="#00aa30">
+<font face="helvetica,verdana,ariel">
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+<tr>
 <td><img src="images/headt.gif"></td>
 </tr>
+</table>
+
+<p>
+Welcome to the Resistance.  Before we can put you back into the field
+to start finding Adelphia's secrets, you'll need some training.
+Complete the modules as needed -- but be aware that you'll find it
+difficult to proceed without proper training.
+</p>
+
+<p>
+Be sure to <a href="how-it-works.html">read the document that explains how
+the training modules work</a>.  Then get started on your training.  And
+good luck: the Resistance is counting on you.
+</p>
+
+ <p>
+VILE
+</p>
+
+<li><a href="tp-j.html"><strong>Whoa&#151;I Know Cartography!</strong></a></li>
+<li><a href="tp-o.html"><strong>Whoa&#151;I Know Dating!</strong></a></li>
+<li><a href="tp-a.html"><strong>Whoa&#151;I Know Dialects!</strong></a></li>
+<li><a href="tp-n.html"><strong>Whoa&#151;I Know Doctoring!</strong></a></li>
+<li><a href="tp-f.html"><strong>Whoa&#151;I Know Drawing!</strong></a></li>
+<li><a href="tp-b.html"><strong>Whoa&#151;I Know Eschatology!</strong></a></li>
+<li><a href="tp-e.html"><strong>Whoa&#151;I Know Football!</strong></a></li>
+<li><a href="tp-g.html"><strong>Whoa&#151;I Know Genealogy!</strong></a></li>
+<li><a href="tp-i.html"><strong>Whoa&#151;I Know Ikebana!</strong></a></li>
+<li><a href="tp-l.html"><strong>Whoa&#151;I Know Jack!</strong></a></li>
+<li><a href="tp-p.html"><strong>Whoa&#151;I Know Kiaido!</strong></a></li>
+<li><a href="tp-q.html"><strong>Whoa&#151;I Know Knitting!</strong></a></li>
+<li><a href="tp-c.html"><strong>Whoa&#151;I Have a Migraine!</strong></a></li>
+<li><a href="tp-h.html"><strong>Whoa&#151;I Know My ABCs!</strong></a></li>
+<li><a href="tp-d.html"><strong>Whoa&#151;I Know Prestidigitation!</strong></a></li>
+<li><a href="tp-k.html"><strong>Whoa&#151;I Know Shoe-Buckling!</strong></a></li>
+<li><a href="tp-m.html"><strong>Whoa&#151;I Know Subtraction!</strong></a></li>
+<li><a href="tp-r.html"><strong>Whoa&#151;I Know Windows!</strong></a></li>
+
+</ul>
+<p><p><br>
+<a href="../index.html">Back to the index</a>
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+<tr><td align="right"><a href="hidden.html"><img src="images/hidden.gif" height="2" width="2"></a></td></tr>
+<tr>
 <td><img src="images/foott.gif"></td>
 </tr>
+</table>
+
+</font>
+</body>
+</html>
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/tp-f.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/tp-f.html
new file mode 100644
index 0000000000000000000000000000000000000000..9ae2123c1e7e28d38a783b6213b98d89aa712315
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-f.html/tp-f.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="Morpheus">
+   <TITLE>Whoa--I Know Drawing!</TITLE>
+</HEAD>
+<BODY BGCOLOR="#000000" text="#00aa30" link="#00aa30" alink="#00aa30" vlink="#00aa30"><!--CUT--><div align=right><small><a href="../../solutions/drawing.html">(Solution)</a></small></div><!--CUT-->
+<font face="helvetica">
+
+<table width="100%">
+ <tr>
+  <td><img src="images/headt.jpg"></td>
+ </tr>
+</table>
+
+
+<h2>Whoa--I Know Drawing!</h2>
+
+<p>
+
+<em>"I don't know.  This looks a little sketchy to me."</em>
+
+<p>
+
+<em>"You show great perspicuity.  However, I'll take that as a compliment."</em>
+
+<p>
+
+<a href="tp-f.mov">23.5M movie file</a>
+
+<p><br><p>
+
+<a href="index.html">Back to the index</a>
+
+
+<table width="100%">
+ <tr>
+  <td><img src="images/foott.jpg"></td>
+ </tr>
+</table>
+
+</FONT>
+</BODY><script src="/checkanswer.js" type="module"></script>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/checkanswer.js b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/checkanswer.js
new file mode 100644
index 0000000000000000000000000000000000000000..cc5741feb1f623cca1b1cf7c57a0777a0c66117b
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/checkanswer.js
@@ -0,0 +1,281 @@
+// Do this first so that layout shift isn't too bad:
+const container = document.createElement("div");
+container.style = `
+  font-size: 16px;
+  font-size: clamp(16px, 2.4vw, 21px);
+  height: 2.5em;
+`;
+document.body.prepend(container);
+
+import { React, html, css, render } from "./package.js";
+
+/**
+ * Remove non-alphanumeric characters.
+ */
+const normalizeAnswer = (answer) => {
+  if (getYear() === 2003) {
+    if (document.URL.includes("teamGuest/2")) {
+      // Special case: 2003 R2, whose answers are emoji.
+      return answer.trim();
+    } else if (document.URL.includes("6_3")) {
+      // Special case: Answer is literal Greek letter.
+      return answer.trim();
+    }
+  }
+  return answer.toUpperCase().replaceAll(/[^A-Z0-9]/g, "");
+};
+
+/**
+ * Returns the year of the hunt we're in.
+ */
+const getYear = () => {
+  return Number(RegExp(`^.*/([0-9]{4})/.*$`).exec(document.URL)?.[1] ?? 0);
+};
+
+/**
+ * Fetches the answers as a list of {url, answer, prompt, intermediate}.
+ */
+const getData = async () => {
+  const res = await fetch("/answers.tsv");
+  const data = await res.text();
+  const [header, ...body] = data.split("\n");
+  const headers = header.trim().split("\t");
+  return body.map((row) => {
+    const res = {};
+    row.split("\t").forEach((item, i) => {
+      res[headers[i]] = item.trim();
+    });
+    return res;
+  });
+};
+
+/**
+ * Gets the base URL; removes trailing index.html and .html, removes everything
+ * before the year, and then removes trailing slash.
+ */
+const getBase = (url) => {
+  const root =
+    RegExp(`^(.*/)index.html`).exec(url)?.[1] ??
+    RegExp(`^(.*).html`).exec(url)?.[1] ??
+    url;
+  const base = RegExp(`^.*/([0-9]{4}/.*)$`).exec(root)?.[1] ?? root;
+  return base.endsWith("/") ? base.slice(0, -1) : base;
+};
+
+/**
+ * Get all rows in the data corresponding to a given URL. Group by same prompt.
+ */
+const getAnswers = (data, url) => {
+  const base = getBase(url);
+  const rows = data.filter((row) => getBase(row.url) === base);
+  const prompts = [];
+  for (const row of rows) {
+    const { prompt } = row;
+    const group = prompts.find((group) => group.prompt === prompt);
+    if (group) {
+      group.rows.push(row);
+    } else {
+      prompts.push({ prompt, rows: [row] });
+    }
+  }
+  return prompts;
+};
+
+/**
+ * A single textbox and submit button in the rows of possible responses.
+ */
+const ResponseRow = ({ prompt, rows, setFeedback }) => {
+  const [response, setResponse] = React.useState("");
+
+  const form = css`
+    align-items: baseline;
+    display: flex;
+    justify-content: right;
+    margin-bottom: 0.5em;
+
+    @media (max-width: 600px) {
+      align-items: flex-start;
+      flex-direction: column;
+    }
+  `;
+
+  const input = css`
+    background: #fafafa;
+    border: 1px solid #aaa;
+    border-radius: 2px;
+    color: #121212;
+    font-family: inherit;
+    font-size: 100%;
+    line-height: 1.2;
+    margin: 0 0.5em;
+    padding: 0.25em 0.5em;
+
+    @media (max-width: 600px) {
+      margin: 0 0 0.25em;
+    }
+  `;
+
+  const onSubmit = (e) => {
+    e.preventDefault();
+    let set = false;
+    for (const row of rows) {
+      const correct = normalizeAnswer(row.answer) === normalizeAnswer(response);
+      if (correct) {
+        setFeedback(
+          row.intermediate?.trim() === "TRUE"
+            ? "Correct! See the solution page for the answer."
+            : `Solved! The answer was ${row.answer}.`
+        );
+        set = true;
+        break;
+      }
+    }
+    if (!set) {
+      setFeedback("Incorrect.");
+    }
+  };
+
+  const onChange = (e) => setResponse(e.target.value);
+
+  return html`
+    <form class=${form} onSubmit=${onSubmit}>
+      <label htmlFor=${prompt + " prompt"}>
+        ${prompt || "Enter your guess"}:
+      </label>
+      <input
+        class=${input}
+        id=${prompt + " prompt"}
+        onChange=${onChange}
+        required
+        type="text"
+        value=${response}
+      />
+      <button type="submit">Submit</button>
+    </form>
+  `;
+};
+
+/**
+ * Check answer button, rendered at top of page.
+ */
+const CheckButton = ({ prompts }) => {
+  const [open, setOpen] = React.useState(false);
+  const [feedback, setFeedback] = React.useState("Call in an answer.");
+
+  const wrapper = css`
+    font-family: "PT Sans", sans-serif;
+    font-size: 16px;
+    font-size: clamp(16px, 2.4vw, 21px);
+    height: 2.5em;
+
+    button {
+      background: #555;
+      border: none;
+      border-radius: 2px;
+      color: #fff;
+      cursor: pointer;
+      display: inline-block;
+      font-size: 1em;
+      font-family: "PT Sans", sans-serif;
+      font-weight: bold;
+      line-height: 1.2;
+      padding: 0.25em 1em;
+      text-align: center;
+      text-decoration: none;
+      text-transform: none;
+    }
+
+    p {
+      margin: 0 0 1em;
+    }
+
+    a {
+      color: inherit !important;
+    }
+  `;
+
+  const btnTop = [2015, 2016].includes(getYear())
+    ? "50px"
+    : [2012].includes(getYear())
+    ? "-2.5em"
+    : "0px";
+
+  const button = css`
+    box-sizing: border-box;
+    height: 2.5em;
+    left: 0;
+    position: absolute;
+    top: ${btnTop};
+    width: 100%;
+    z-index: 9999;
+  `;
+
+  const dropdownWrapper = css`
+    background: #edeff0;
+    color: #121212;
+    left: 0;
+    position: absolute;
+    right: 0;
+    top: calc(2.5em + ${btnTop});
+    z-index: 9999;
+  `;
+
+  const dropdown = css`
+    margin: 0 auto;
+    max-width: 40em;
+    padding: 1em;
+    z-index: 9999;
+  `;
+
+  const responses = css`
+    margin: 0 auto;
+    width: fit-content;
+
+    @media (max-width: 600px) {
+      width: auto;
+    }
+  `;
+
+  const onClick = () => setOpen(!open);
+
+  const body =
+    prompts.length > 0
+      ? prompts.map(
+          (group) =>
+            html`<${ResponseRow} setFeedback=${setFeedback} ...${group} />`
+        )
+      : html`<p>
+          No answers found on this page. Please report this to${" "}
+          <a href="mailto:puzzle@mit.edu">puzzle@mit.edu</a>.
+        </p>`;
+
+  return html`
+    <style>
+      @import url("https://fonts.googleapis.com/css2?family=PT+Sans:wght@400;700&display=swap");
+
+      ${[2015, 2016].includes(getYear()) &&
+      ".navbar-fixed-top { z-index: 10000 }"}
+      ${[2012].includes(getYear()) &&
+      "body { top: 2.5em } #check-answer, #shortcuts { z-index: 10000 !important }"}
+      ${[2006].includes(getYear()) && 'img[alt="Check Answer"] { display: none }'}
+    </style>
+    <div class=${wrapper}>
+      <button class=${button} onClick=${onClick}>
+        Check your answers spoiler-free
+      </button>
+      ${open &&
+      html`
+        <div class=${dropdownWrapper}>
+          <div class=${dropdown}>
+            <p>${feedback}</p>
+            <div class=${responses}>${body}</div>
+          </div>
+        </div>
+      `}
+    </div>
+  `;
+};
+
+const data = await getData();
+const prompts = getAnswers(data, document.URL);
+render(html`<${CheckButton} prompts=${prompts} />`, container);
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/genealogy.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/genealogy.html
new file mode 100644
index 0000000000000000000000000000000000000000..6bfacd58a30c5ad8366b562cfba3db41d55c893f
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/genealogy.html
@@ -0,0 +1,105 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="Lance Nathan">
+   <META NAME="GENERATOR" CONTENT="me typing damnit">
+   <TITLE>Whoa--I Know Genealogy!</TITLE>
+</HEAD>
+<BODY BGCOLOR="#ffffff">
+
+<h2>T Puzzle: Whoa--I Know Genealogy!</h2>
+<h3>by Norvin Richards</h3>
+
+<p>
+
+There are 8 kinds of people, whose possible relations to each other can
+be diagrammed like so:
+
+<p>
+
+<center><img src="genealogy-1.gif"></center>
+
+<p>
+
+Here the = signs represent possible marriages, the double-headed arrows
+are patrilines, and the single-headed arrows are matrilines.  So, for
+example, someone of kind 1 is supposed to marry someone of kind 2.  If
+the 1 is a man and the 2 is a woman, then their children are 3s; if the 1
+is a woman and the 2 is a man, their children are 5s.  The patrilines and
+the matrilines are redundant if people marry properly; a 1 man and a 2
+woman have 3 children because the patriline from 1, and also the
+matriline from 2, point to 3.  The patrilines are double-headed because
+not only are a 1 man's children 3s, but a 3 man's children are 1s.  On
+the other hand, a 2 woman's children are 3s, but a 3 woman's children are
+7s (and a 7 woman's children are 6s, and a 6 woman's children are 2s).
+
+<p>
+
+The kinship terms have three components.  One tells how the types are
+related to each other; that is, what combinations of marriages,
+patrilines, and matrilines you'd have to move along in the diagram above
+to connect the two people.  From the point of view of a 1, these
+components are as follows:
+
+<ol>
+<li>kpamic</li>
+<li>lugoman</li>
+<li>gbimukh</li>
+<li>degbuth</li>
+<li>mnegil</li>
+<li>migedogh</li>
+<li>tsivisty</li>
+<li>ngemedlel</li>
+</ol>
+
+Another component of the kinship terms carries information about the age
+relation between the two people.  For a statement like "A is B's X", the
+kinship term X will contain an infix -ak-, attached before the first
+vowel of the word, if A is in a younger generation than B; if A is in an
+older generation than B, X will show reduplication of the consonant(s)
+preceding the first vowel, followed by a vowel i.  If A and B are in the
+same generation, there's no morpheme in this slot.
+
+<p>
+
+Finally, there's an indicator of the gender of the person referred to by
+the kinship term.  This is a floating w for men or y for women, which
+attaches to the last consonant other than d, t, or l that precedes a
+vowel (equivalently for these words, it attaches to the first consonant
+in the second syllable, prior to the reduplication/infixation described
+above).
+
+<p>
+
+The answers to the questions at the end of the puzzle are:
+
+<p>
+
+<ul>
+<li>Wot is Inne's tsivyisty</li>
+<li>Hegit is Ent's ngemwedlel</li>
+<li>Wot is Xis'  dakegbyuth</li>
+<li>Xis is Svene's kpamwic</li>
+<li>Neo is Ethre's lugomwan</li>
+<li>Inne is Svene's makigyedogh</li>
+<li>Inne is Ent's tsakivyisty</li>
+<li>Ofur is Vife's lugomyan</li>
+</ul>
+
+<p>
+
+The names are anagrams of numbers; if you take the letters indicated by
+these numbers from the kinship term, they spell "SYLLABIC L GOES TO M". 
+
+<p>
+
+The family tree described in the problem is below (I've put men's names
+in boldface and underlined women's names; = represents marriage, again,
+and the lines connect sets of siblings with their parents in hopefully
+intuitive ways):
+
+<center><img src="genealogy-2.gif"></center>
+
+</BODY>
+</HTML>
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/index.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..c7ecaa6fdae9a9b082edb903241e4a33faeae4fa
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/index.html
@@ -0,0 +1,67 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
 <head>
 <title>Training Index</title>
 <meta
+http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<style TYPE="text/css">
+.font: { helvetica,verdana,ariel; }
+</style>
+</head>
+
+<body bgcolor="#000000" text="#00aa30" link="#00aa30" vlink="#00aa30">
+<font face="helvetica,verdana,ariel">
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+<tr>
 <td><img src="images/headt.gif"></td>
 </tr>
+</table>
+
+<p>
+Welcome to the Resistance.  Before we can put you back into the field
+to start finding Adelphia's secrets, you'll need some training.
+Complete the modules as needed -- but be aware that you'll find it
+difficult to proceed without proper training.
+</p>
+
+<p>
+Be sure to <a href="how-it-works.html">read the document that explains how
+the training modules work</a>.  Then get started on your training.  And
+good luck: the Resistance is counting on you.
+</p>
+
+ <p>
+VILE
+</p>
+
+<li><a href="tp-j.html"><strong>Whoa&#151;I Know Cartography!</strong></a></li>
+<li><a href="tp-o.html"><strong>Whoa&#151;I Know Dating!</strong></a></li>
+<li><a href="tp-a.html"><strong>Whoa&#151;I Know Dialects!</strong></a></li>
+<li><a href="tp-n.html"><strong>Whoa&#151;I Know Doctoring!</strong></a></li>
+<li><a href="tp-f.html"><strong>Whoa&#151;I Know Drawing!</strong></a></li>
+<li><a href="tp-b.html"><strong>Whoa&#151;I Know Eschatology!</strong></a></li>
+<li><a href="tp-e.html"><strong>Whoa&#151;I Know Football!</strong></a></li>
+<li><a href="tp-g.html"><strong>Whoa&#151;I Know Genealogy!</strong></a></li>
+<li><a href="tp-i.html"><strong>Whoa&#151;I Know Ikebana!</strong></a></li>
+<li><a href="tp-l.html"><strong>Whoa&#151;I Know Jack!</strong></a></li>
+<li><a href="tp-p.html"><strong>Whoa&#151;I Know Kiaido!</strong></a></li>
+<li><a href="tp-q.html"><strong>Whoa&#151;I Know Knitting!</strong></a></li>
+<li><a href="tp-c.html"><strong>Whoa&#151;I Have a Migraine!</strong></a></li>
+<li><a href="tp-h.html"><strong>Whoa&#151;I Know My ABCs!</strong></a></li>
+<li><a href="tp-d.html"><strong>Whoa&#151;I Know Prestidigitation!</strong></a></li>
+<li><a href="tp-k.html"><strong>Whoa&#151;I Know Shoe-Buckling!</strong></a></li>
+<li><a href="tp-m.html"><strong>Whoa&#151;I Know Subtraction!</strong></a></li>
+<li><a href="tp-r.html"><strong>Whoa&#151;I Know Windows!</strong></a></li>
+
+</ul>
+<p><p><br>
+<a href="../index.html">Back to the index</a>
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+<tr><td align="right"><a href="hidden.html"><img src="images/hidden.gif" height="2" width="2"></a></td></tr>
+<tr>
 <td><img src="images/foott.gif"></td>
 </tr>
+</table>
+
+</font>
+</body>
+</html>
+
+
+
+
+
+
diff --git a/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/tp-g.html b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/tp-g.html
new file mode 100644
index 0000000000000000000000000000000000000000..889feab70afe20f734bcb5327332474ff20156b5
--- /dev/null
+++ b/benchmark/MIT_Mystery_Hunt/puzzles/by_tsv/2003/2003_www.acme-corp.com_teamGuest_Training_tp-g.html/tp-g.html
@@ -0,0 +1,178 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
+   <META NAME="Author" CONTENT="VILE">
+   <META NAME="GENERATOR" CONTENT="Morpheus">
+   <TITLE>Whoa--I Know Genealogy!</TITLE>
+</HEAD>
+<BODY BGCOLOR="#000000" text="#00aa30" link="#00aa30" alink="#00aa30" vlink="#00aa30"><!--CUT--><div align=right><small><a href="../../solutions/genealogy.html">(Solution)</a></small></div><!--CUT-->
+<font face="helvetica">
+
+<table width="100%">
+ <tr>
+  <td><img src="images/headt.jpg"></td>
+ </tr>
+</table>
+
+
+<h2>Whoa--I Know Genealogy!</h2>
+
+<p>
+
+<em>"AIs have families?"</em>
+
+<p>
+
+<em>"Not as we understand it.  But according to them, there are only a few kinds of person in this world.  In fact, the AIs have figured out exactly how many kinds there are, and have developed a system of understanding human relationships that they use in their breeding program."</em>
+
+<p>
+
+The number of kinds of people is the smallest one such that:
+
+<p>
+
+<ul>
+<li>Every kind of person has exactly one distinct kind of person they may marry.</li>
+<li>The children of a couple are of the same kind as the father of the man, or the woman's mother's
+mother's mother.</li>
+<li>No one may marry their first cousin or their parents.</li>
+</ul>
+
+<p>
+
+The vocabulary of kinship terms that the AIs have developed is based on this system of kinds.
+
+<p>
+
+For example, Neo's father is Steet, and his mother is Niam.  In AI terms, Steet is Neo's gbigbimwukh, and Niam is Neo's didegbyuth.
+
+<p>
+
+Steet is Niam's lugomwan, and Niam is Steet's lugomyan.
+
+<p>
+
+Neo is Steet's gbakimwukh, and he is Niam's mnakegwil.
+
+<p>
+
+Steet has one brother (kpamwic), Opit, and one sister (kpamyic), Ndub.
+
+<p>
+
+Niam has one kpamyic, Isuku, and one kpamwic, Xis.
+
+<p>
+
+Opit is Neo's gbigbimwukh, and Ndub is his gbigbimyukh.
+
+<p>
+
+Neo is Opit and Ndub's gbakimwukh.
+
+<p>
+
+Isuku is Neo's didegbyuth, and Xis is his didegbwuth.
+
+<p>
+
+Neo is Isuku and Xis' mnakegwil.
+
+<p>
+
+Niam's gbigbimwukh is Nezh, and her didegbyuth is Yuzu.
+
+<p>
+
+Nezh is Steet's mnimnegwil, and Yuzu is his mimigyedogh.
+
+<p>
+
+Nezh is Neo's tsitsivwisty, and Yuzu is his ngingemyedlel.
+
+<p>
+
+Neo is Nezh's tsakivwisty, and Yuzu's ngakemwedlel.
+
+<p>
+
+Steet's gbigbimwukh is Hegit, and his didegbyuth is Thac.
+
+<p>
+
+Hegit is Neo's kpikpamwic, and Thac is his lilugomyan.
+
+<p>
+
+Xis' lugomyan is Ise; he has a gbakimwukh, Edu, and a gbakimyukh, Vad.
+
+<p>
+
+Edu's kpamyic is Vad, and his lugomyan is Wot.
+
+<p>
+
+Vad has a lugomwan, Nikay, and a mnakegwil, Isivi, who has a gbakimwukh, Vife.
+
+<p>
+
+Yuzu has a kpamwic, Ent, who has a tsakivyisty named Ethre.
+
+<p>
+
+Opit's lugomyan is Svene; he has two gbakimwukh, Yuku and Yimas, and a gbakimyukh, Fune.
+
+<p>
+
+Yimas has a lugomyan, Inne, and a tsakivyisty named Ofur.
+
+<p>
+
+Now let's see how much of this you've understood.
+
+<p>
+
+Wot is Inne's _____
+
+<p>
+
+Hegit is Ent's ____
+
+<p>
+
+Wot is Xis'  ____
+
+<p>
+
+Xis is Svene's ____
+
+<p>
+
+Neo is Ethre's ____
+
+<p>
+
+Inne is Svene's _____
+
+<p>
+
+Inne is Ent's _____
+
+<p>
+
+Ofur is Vife's _____
+
+<p><br><p>
+
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