Datasets:
| (A) | |
| | | Col 1 | Col 2 | Col 3 | Col 4 | Col 5 | | |
| | Row 1 | _ | _ | _ | _ | * | | |
| | Row 2 | _ | _ | @ | # | _ | | |
| | Row 3 | _ | _ | _ | # | # | | |
| | Row 4 | _ | _ | _ | _ | _ | | |
| | Row 5 | _ | _ | _ | # | _ | | |
| (B) | |
| | | Col 1 | Col 2 | Col 3 | | |
| | Row 1 | _ | _ | _ | | |
| | Row 2 | _ | _ | * | | |
| | Row 3 | @ | _ | _ | | |
| (C) | |
| | | Col 1 | Col 2 | Col 3 | | |
| | Row 1 | _ | * | _ | | |
| | Row 2 | # | _ | @ | | |
| | Row 3 | # | # | _ | | |
| (D) | |
| | | Col 1 | Col 2 | Col 3 | Col 4 | | |
| | Row 1 | _ | _ | _ | _ | | |
| | Row 2 | _ | _ | _ | _ | | |
| | Row 3 | @ | _ | # | _ | | |
| | Row 4 | _ | _ | # | * | | |