Remove massive_scale_simple.py - cleanup for OS launch
Browse files- massive_scale_simple.py +0 -395
massive_scale_simple.py
DELETED
|
@@ -1,395 +0,0 @@
|
|
| 1 |
-
#!/usr/bin/env python3
|
| 2 |
-
"""
|
| 3 |
-
BitTransformerLM Massive Scale Training - SIMPLIFIED & OPTIMIZED
|
| 4 |
-
=================================================================
|
| 5 |
-
|
| 6 |
-
Fixed version that properly initializes 680M parameter model with all optimizations!
|
| 7 |
-
Uses DataParallel for multi-GPU instead of FSDP to avoid initialization issues.
|
| 8 |
-
"""
|
| 9 |
-
|
| 10 |
-
import os
|
| 11 |
-
import sys
|
| 12 |
-
import time
|
| 13 |
-
import json
|
| 14 |
-
import logging
|
| 15 |
-
from datetime import datetime
|
| 16 |
-
from typing import Dict, Any, Optional
|
| 17 |
-
|
| 18 |
-
import torch
|
| 19 |
-
import torch.nn as nn
|
| 20 |
-
import torch.nn.functional as F
|
| 21 |
-
from torch.utils.data import DataLoader
|
| 22 |
-
import datasets
|
| 23 |
-
from datasets import load_dataset
|
| 24 |
-
import numpy as np
|
| 25 |
-
|
| 26 |
-
# BitTransformerLM imports
|
| 27 |
-
from bit_transformer.model import BitTransformerLM
|
| 28 |
-
from bit_transformer.bit_io import text_to_bits, bits_to_text
|
| 29 |
-
from bit_transformer.utils import set_dropout
|
| 30 |
-
|
| 31 |
-
# Configure logging
|
| 32 |
-
logging.basicConfig(level=logging.INFO, format='%(asctime)s [%(levelname)s] %(message)s')
|
| 33 |
-
logger = logging.getLogger(__name__)
|
| 34 |
-
|
| 35 |
-
|
| 36 |
-
class OptimizedConfig:
|
| 37 |
-
"""Optimized 680M parameter configuration with ALL BitTransformerLM features enabled."""
|
| 38 |
-
|
| 39 |
-
# Model Architecture (680M parameters - CONFIRMED)
|
| 40 |
-
D_MODEL = 1536
|
| 41 |
-
NUM_LAYERS = 24
|
| 42 |
-
NUM_HEADS = 24
|
| 43 |
-
DIM_FEEDFORWARD = 6144
|
| 44 |
-
MAX_SEQ_LEN = 2048
|
| 45 |
-
|
| 46 |
-
# Training Configuration
|
| 47 |
-
BATCH_SIZE_PER_GPU = 1 # Ultra conservative for 680M model
|
| 48 |
-
NUM_GPUS = 4
|
| 49 |
-
TOTAL_BATCH_SIZE = BATCH_SIZE_PER_GPU * NUM_GPUS # 4
|
| 50 |
-
GRADIENT_ACCUMULATION_STEPS = 32 # Effective batch size = 128
|
| 51 |
-
|
| 52 |
-
LEARNING_RATE = 3e-4 # Optimal for 680M model
|
| 53 |
-
WEIGHT_DECAY = 0.01
|
| 54 |
-
MAX_STEPS = 10000
|
| 55 |
-
WARMUP_STEPS = 500
|
| 56 |
-
|
| 57 |
-
# BitTransformerLM Optimizations - ALL ENABLED!
|
| 58 |
-
USE_REVERSIBLE = True # 50% memory savings
|
| 59 |
-
USE_GRADIENT_CHECKPOINTING = True # Additional memory savings
|
| 60 |
-
USE_MIXED_PRECISION = True # FP16 training
|
| 61 |
-
USE_AUTOCAST = True # CPU mixed precision when needed
|
| 62 |
-
CHUNK_SIZE = None # Full attention (no chunking)
|
| 63 |
-
FULL_ATTN_LOGGING = False # Memory optimization
|
| 64 |
-
|
| 65 |
-
# Safety & Telemetry
|
| 66 |
-
LAMBDA_K = 1.0
|
| 67 |
-
LAMBDA_C = 1.0
|
| 68 |
-
LAMBDA_S = 1.0
|
| 69 |
-
NEGENTROPY_THRESHOLD = 0.2
|
| 70 |
-
LZ_COMPLEXITY_THRESHOLD = 0.3
|
| 71 |
-
SYMBIOSIS_THRESHOLD = 0.5
|
| 72 |
-
|
| 73 |
-
@classmethod
|
| 74 |
-
def get_model_config(cls) -> Dict[str, Any]:
|
| 75 |
-
"""Get optimized model configuration."""
|
| 76 |
-
return {
|
| 77 |
-
"d_model": cls.D_MODEL,
|
| 78 |
-
"nhead": cls.NUM_HEADS,
|
| 79 |
-
"num_layers": cls.NUM_LAYERS,
|
| 80 |
-
"dim_feedforward": cls.DIM_FEEDFORWARD,
|
| 81 |
-
"max_seq_len": cls.MAX_SEQ_LEN,
|
| 82 |
-
"lambda_K": cls.LAMBDA_K,
|
| 83 |
-
"lambda_C": cls.LAMBDA_C,
|
| 84 |
-
"lambda_S": cls.LAMBDA_S,
|
| 85 |
-
"reversible": cls.USE_REVERSIBLE,
|
| 86 |
-
"use_checkpoint": cls.USE_GRADIENT_CHECKPOINTING,
|
| 87 |
-
"use_autocast": cls.USE_AUTOCAST,
|
| 88 |
-
"chunk_size": cls.CHUNK_SIZE,
|
| 89 |
-
"full_attn_logging": cls.FULL_ATTN_LOGGING,
|
| 90 |
-
}
|
| 91 |
-
|
| 92 |
-
|
| 93 |
-
class SimpleWikiTextDataset(torch.utils.data.Dataset):
|
| 94 |
-
"""Simplified WikiText dataset for bit-level training."""
|
| 95 |
-
|
| 96 |
-
def __init__(self, split: str = "train", max_samples: int = 1000, max_length: int = 2048):
|
| 97 |
-
self.max_length = max_length
|
| 98 |
-
|
| 99 |
-
logger.info(f"Loading WikiText-103 {split} split (max {max_samples} samples)...")
|
| 100 |
-
dataset = load_dataset("wikitext", "wikitext-103-raw-v1", split=split)
|
| 101 |
-
|
| 102 |
-
# Filter and limit samples
|
| 103 |
-
texts = [item['text'] for item in dataset if len(item['text'].strip()) > 100][:max_samples]
|
| 104 |
-
self.texts = texts
|
| 105 |
-
|
| 106 |
-
logger.info(f"Loaded {len(self.texts)} text samples from {split}")
|
| 107 |
-
|
| 108 |
-
def __len__(self) -> int:
|
| 109 |
-
return len(self.texts)
|
| 110 |
-
|
| 111 |
-
def __getitem__(self, idx: int) -> Dict[str, torch.Tensor]:
|
| 112 |
-
text = self.texts[idx]
|
| 113 |
-
|
| 114 |
-
try:
|
| 115 |
-
# Convert text to bits
|
| 116 |
-
bits = text_to_bits(text)
|
| 117 |
-
|
| 118 |
-
# Truncate or pad to max_length
|
| 119 |
-
if len(bits) > self.max_length:
|
| 120 |
-
bits = bits[:self.max_length]
|
| 121 |
-
elif len(bits) < self.max_length:
|
| 122 |
-
bits = bits + [0] * (self.max_length - len(bits))
|
| 123 |
-
|
| 124 |
-
# Convert to tensor
|
| 125 |
-
input_bits = torch.tensor(bits[:-1], dtype=torch.long)
|
| 126 |
-
target_bits = torch.tensor(bits[1:], dtype=torch.long)
|
| 127 |
-
|
| 128 |
-
return {
|
| 129 |
-
'input_ids': input_bits,
|
| 130 |
-
'labels': target_bits,
|
| 131 |
-
'attention_mask': torch.ones_like(input_bits)
|
| 132 |
-
}
|
| 133 |
-
|
| 134 |
-
except Exception as e:
|
| 135 |
-
logger.warning(f"Error processing text at index {idx}: {e}")
|
| 136 |
-
# Fallback
|
| 137 |
-
fallback_bits = [0, 1] * (self.max_length // 2)
|
| 138 |
-
input_bits = torch.tensor(fallback_bits[:-1], dtype=torch.long)
|
| 139 |
-
target_bits = torch.tensor(fallback_bits[1:], dtype=torch.long)
|
| 140 |
-
|
| 141 |
-
return {
|
| 142 |
-
'input_ids': input_bits,
|
| 143 |
-
'labels': target_bits,
|
| 144 |
-
'attention_mask': torch.ones_like(input_bits)
|
| 145 |
-
}
|
| 146 |
-
|
| 147 |
-
|
| 148 |
-
def create_optimized_model(config: OptimizedConfig) -> nn.Module:
|
| 149 |
-
"""Create properly optimized BitTransformerLM model."""
|
| 150 |
-
|
| 151 |
-
# Create model on CPU first
|
| 152 |
-
logger.info("🏗️ Creating optimized BitTransformerLM model...")
|
| 153 |
-
model_config = config.get_model_config()
|
| 154 |
-
|
| 155 |
-
logger.info("Model configuration:")
|
| 156 |
-
for k, v in model_config.items():
|
| 157 |
-
logger.info(f" {k}: {v}")
|
| 158 |
-
|
| 159 |
-
model = BitTransformerLM(**model_config)
|
| 160 |
-
|
| 161 |
-
# Count parameters
|
| 162 |
-
params = sum(p.numel() for p in model.parameters() if p.requires_grad)
|
| 163 |
-
logger.info(f"✅ Model created: {params:,} parameters ({params/1e6:.1f}M)")
|
| 164 |
-
|
| 165 |
-
# Move to GPU and setup DataParallel
|
| 166 |
-
if torch.cuda.is_available() and torch.cuda.device_count() >= config.NUM_GPUS:
|
| 167 |
-
logger.info(f"🚀 Setting up multi-GPU training on {config.NUM_GPUS} GPUs...")
|
| 168 |
-
|
| 169 |
-
# Move model to GPU 0
|
| 170 |
-
model = model.cuda()
|
| 171 |
-
|
| 172 |
-
# Wrap with DataParallel for multi-GPU
|
| 173 |
-
if config.NUM_GPUS > 1:
|
| 174 |
-
model = nn.DataParallel(model, device_ids=list(range(config.NUM_GPUS)))
|
| 175 |
-
logger.info(f"✅ DataParallel setup complete across GPUs: {list(range(config.NUM_GPUS))}")
|
| 176 |
-
|
| 177 |
-
else:
|
| 178 |
-
logger.warning("⚠️ Limited GPU availability - using single GPU or CPU")
|
| 179 |
-
if torch.cuda.is_available():
|
| 180 |
-
model = model.cuda()
|
| 181 |
-
|
| 182 |
-
return model
|
| 183 |
-
|
| 184 |
-
|
| 185 |
-
def train_step(model: nn.Module, batch: Dict[str, torch.Tensor],
|
| 186 |
-
optimizer: torch.optim.Optimizer, scaler: torch.cuda.amp.GradScaler,
|
| 187 |
-
config: OptimizedConfig) -> tuple:
|
| 188 |
-
"""Optimized training step with all BitTransformerLM features."""
|
| 189 |
-
|
| 190 |
-
model.train()
|
| 191 |
-
set_dropout(model, 0.1) # Enable dropout for training
|
| 192 |
-
|
| 193 |
-
# Move batch to GPU
|
| 194 |
-
input_ids = batch['input_ids'].cuda(non_blocking=True)
|
| 195 |
-
labels = batch['labels'].cuda(non_blocking=True)
|
| 196 |
-
|
| 197 |
-
# Forward pass with mixed precision
|
| 198 |
-
with torch.cuda.amp.autocast(enabled=config.USE_MIXED_PRECISION):
|
| 199 |
-
outputs = model(input_ids)
|
| 200 |
-
|
| 201 |
-
if isinstance(outputs, tuple):
|
| 202 |
-
logits, telemetry = outputs
|
| 203 |
-
else:
|
| 204 |
-
logits, telemetry = outputs, {}
|
| 205 |
-
|
| 206 |
-
# Compute loss
|
| 207 |
-
loss = F.cross_entropy(logits.view(-1, 2), labels.view(-1), reduction='mean')
|
| 208 |
-
|
| 209 |
-
# Add safety penalties if enabled
|
| 210 |
-
safety_penalty = 0.0
|
| 211 |
-
if telemetry:
|
| 212 |
-
negentropy = telemetry.get('negentropy', 1.0)
|
| 213 |
-
lz_complexity = telemetry.get('lz_complexity', 1.0)
|
| 214 |
-
symbiosis = telemetry.get('symbiosis', 1.0)
|
| 215 |
-
|
| 216 |
-
if (negentropy < config.NEGENTROPY_THRESHOLD or
|
| 217 |
-
lz_complexity < config.LZ_COMPLEXITY_THRESHOLD or
|
| 218 |
-
symbiosis < config.SYMBIOSIS_THRESHOLD):
|
| 219 |
-
safety_penalty = 0.1
|
| 220 |
-
loss = loss + safety_penalty
|
| 221 |
-
|
| 222 |
-
# Scale for gradient accumulation
|
| 223 |
-
loss = loss / config.GRADIENT_ACCUMULATION_STEPS
|
| 224 |
-
|
| 225 |
-
# Backward pass
|
| 226 |
-
scaler.scale(loss).backward()
|
| 227 |
-
|
| 228 |
-
return loss.item() * config.GRADIENT_ACCUMULATION_STEPS, telemetry, safety_penalty
|
| 229 |
-
|
| 230 |
-
|
| 231 |
-
def main():
|
| 232 |
-
"""Main training function."""
|
| 233 |
-
|
| 234 |
-
logger.info("🚀 OPTIMIZED MASSIVE SCALE BITTRANSFORMERLM TRAINING!")
|
| 235 |
-
logger.info("=" * 60)
|
| 236 |
-
|
| 237 |
-
config = OptimizedConfig()
|
| 238 |
-
|
| 239 |
-
# Check CUDA
|
| 240 |
-
if not torch.cuda.is_available():
|
| 241 |
-
logger.error("❌ CUDA not available!")
|
| 242 |
-
return
|
| 243 |
-
|
| 244 |
-
logger.info(f"🔥 Hardware: {torch.cuda.device_count()}x GPUs detected")
|
| 245 |
-
for i in range(torch.cuda.device_count()):
|
| 246 |
-
props = torch.cuda.get_device_properties(i)
|
| 247 |
-
logger.info(f" GPU {i}: {props.name} ({props.total_memory / 1024**3:.1f}GB)")
|
| 248 |
-
|
| 249 |
-
# Create model
|
| 250 |
-
model = create_optimized_model(config)
|
| 251 |
-
|
| 252 |
-
# Create datasets
|
| 253 |
-
logger.info("📚 Loading datasets...")
|
| 254 |
-
train_dataset = SimpleWikiTextDataset("train", max_samples=2000, max_length=config.MAX_SEQ_LEN)
|
| 255 |
-
val_dataset = SimpleWikiTextDataset("validation", max_samples=100, max_length=config.MAX_SEQ_LEN)
|
| 256 |
-
|
| 257 |
-
# Create dataloaders
|
| 258 |
-
train_loader = DataLoader(
|
| 259 |
-
train_dataset,
|
| 260 |
-
batch_size=config.BATCH_SIZE_PER_GPU,
|
| 261 |
-
shuffle=True,
|
| 262 |
-
num_workers=2,
|
| 263 |
-
pin_memory=True
|
| 264 |
-
)
|
| 265 |
-
|
| 266 |
-
val_loader = DataLoader(
|
| 267 |
-
val_dataset,
|
| 268 |
-
batch_size=config.BATCH_SIZE_PER_GPU,
|
| 269 |
-
shuffle=False,
|
| 270 |
-
num_workers=1,
|
| 271 |
-
pin_memory=True
|
| 272 |
-
)
|
| 273 |
-
|
| 274 |
-
# Setup optimizer and scheduler
|
| 275 |
-
logger.info("⚙️ Setting up optimizer...")
|
| 276 |
-
optimizer = torch.optim.AdamW(
|
| 277 |
-
model.parameters(),
|
| 278 |
-
lr=config.LEARNING_RATE,
|
| 279 |
-
weight_decay=config.WEIGHT_DECAY,
|
| 280 |
-
betas=(0.9, 0.95)
|
| 281 |
-
)
|
| 282 |
-
|
| 283 |
-
scheduler = torch.optim.lr_scheduler.OneCycleLR(
|
| 284 |
-
optimizer,
|
| 285 |
-
max_lr=config.LEARNING_RATE,
|
| 286 |
-
total_steps=config.MAX_STEPS,
|
| 287 |
-
pct_start=config.WARMUP_STEPS / config.MAX_STEPS,
|
| 288 |
-
)
|
| 289 |
-
|
| 290 |
-
scaler = torch.cuda.amp.GradScaler(enabled=config.USE_MIXED_PRECISION)
|
| 291 |
-
|
| 292 |
-
# Training loop
|
| 293 |
-
logger.info("🎯 Starting training...")
|
| 294 |
-
logger.info(f"Target steps: {config.MAX_STEPS}")
|
| 295 |
-
logger.info(f"Effective batch size: {config.TOTAL_BATCH_SIZE * config.GRADIENT_ACCUMULATION_STEPS}")
|
| 296 |
-
|
| 297 |
-
step = 0
|
| 298 |
-
running_loss = 0.0
|
| 299 |
-
start_time = time.time()
|
| 300 |
-
|
| 301 |
-
for epoch in range(100): # Large number
|
| 302 |
-
for batch_idx, batch in enumerate(train_loader):
|
| 303 |
-
# Training step
|
| 304 |
-
loss, telemetry, safety_penalty = train_step(
|
| 305 |
-
model, batch, optimizer, scaler, config
|
| 306 |
-
)
|
| 307 |
-
running_loss += loss
|
| 308 |
-
|
| 309 |
-
# Gradient accumulation
|
| 310 |
-
if (batch_idx + 1) % config.GRADIENT_ACCUMULATION_STEPS == 0:
|
| 311 |
-
# Gradient clipping
|
| 312 |
-
scaler.unscale_(optimizer)
|
| 313 |
-
torch.nn.utils.clip_grad_norm_(model.parameters(), 1.0)
|
| 314 |
-
|
| 315 |
-
# Optimizer step
|
| 316 |
-
scaler.step(optimizer)
|
| 317 |
-
scaler.update()
|
| 318 |
-
scheduler.step()
|
| 319 |
-
optimizer.zero_grad()
|
| 320 |
-
|
| 321 |
-
step += 1
|
| 322 |
-
|
| 323 |
-
# Logging
|
| 324 |
-
if step % 10 == 0:
|
| 325 |
-
avg_loss = running_loss / 10
|
| 326 |
-
elapsed = time.time() - start_time
|
| 327 |
-
samples_per_sec = (config.TOTAL_BATCH_SIZE * 10) / elapsed
|
| 328 |
-
memory_used = torch.cuda.max_memory_allocated() / (1024**3)
|
| 329 |
-
|
| 330 |
-
logger.info(
|
| 331 |
-
f"Step {step:4d} | "
|
| 332 |
-
f"Loss: {avg_loss:.4f} | "
|
| 333 |
-
f"K: {telemetry.get('negentropy', 0):.3f} | "
|
| 334 |
-
f"C: {telemetry.get('lz_complexity', 0):.3f} | "
|
| 335 |
-
f"S: {telemetry.get('symbiosis', 0):.3f} | "
|
| 336 |
-
f"LR: {scheduler.get_last_lr()[0]:.2e} | "
|
| 337 |
-
f"Speed: {samples_per_sec:.1f} samp/s | "
|
| 338 |
-
f"Mem: {memory_used:.1f}GB"
|
| 339 |
-
+ (f" | Safety: {safety_penalty:.3f}" if safety_penalty > 0 else "")
|
| 340 |
-
)
|
| 341 |
-
|
| 342 |
-
running_loss = 0.0
|
| 343 |
-
start_time = time.time()
|
| 344 |
-
|
| 345 |
-
# Validation
|
| 346 |
-
if step % 100 == 0:
|
| 347 |
-
model.eval()
|
| 348 |
-
set_dropout(model, 0.0)
|
| 349 |
-
val_loss = 0
|
| 350 |
-
|
| 351 |
-
with torch.no_grad():
|
| 352 |
-
for val_batch in val_loader:
|
| 353 |
-
val_input_ids = val_batch['input_ids'].cuda()
|
| 354 |
-
val_labels = val_batch['labels'].cuda()
|
| 355 |
-
|
| 356 |
-
with torch.cuda.amp.autocast(enabled=config.USE_MIXED_PRECISION):
|
| 357 |
-
val_outputs = model(val_input_ids)
|
| 358 |
-
if isinstance(val_outputs, tuple):
|
| 359 |
-
val_logits, _ = val_outputs
|
| 360 |
-
else:
|
| 361 |
-
val_logits = val_outputs
|
| 362 |
-
|
| 363 |
-
val_loss += F.cross_entropy(
|
| 364 |
-
val_logits.view(-1, 2),
|
| 365 |
-
val_labels.view(-1)
|
| 366 |
-
).item()
|
| 367 |
-
|
| 368 |
-
val_loss /= len(val_loader)
|
| 369 |
-
logger.info(f"📊 Validation Loss: {val_loss:.4f}")
|
| 370 |
-
|
| 371 |
-
# Save checkpoint
|
| 372 |
-
if step % 500 == 0:
|
| 373 |
-
checkpoint_dir = f"/data/checkpoints/massive_simple_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
|
| 374 |
-
os.makedirs(checkpoint_dir, exist_ok=True)
|
| 375 |
-
|
| 376 |
-
torch.save({
|
| 377 |
-
'step': step,
|
| 378 |
-
'model_state_dict': model.state_dict(),
|
| 379 |
-
'optimizer_state_dict': optimizer.state_dict(),
|
| 380 |
-
'scheduler_state_dict': scheduler.state_dict(),
|
| 381 |
-
'config': config.get_model_config(),
|
| 382 |
-
}, f"{checkpoint_dir}/checkpoint_step_{step:06d}.pt")
|
| 383 |
-
|
| 384 |
-
logger.info(f"💾 Checkpoint saved: step {step}")
|
| 385 |
-
|
| 386 |
-
if step >= config.MAX_STEPS:
|
| 387 |
-
logger.info("🏁 Training completed!")
|
| 388 |
-
return
|
| 389 |
-
|
| 390 |
-
if step >= config.MAX_STEPS:
|
| 391 |
-
break
|
| 392 |
-
|
| 393 |
-
|
| 394 |
-
if __name__ == "__main__":
|
| 395 |
-
main()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|