Tick: 21
| Rows | C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | C11 | C12 | C13 | C14 | C15 | C16 | C17 | C18 | C19 | C20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R1 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | O | O | X | X |
| R2 | X | X | X | X | X | X | X | X | X | X | X | X | O | X | O | O | X | O | X | X |
| R3 | X | X | X | X | X | X | X | O | X | X | X | X | X | O | X | X | O | X | X | X |
| R4 | X | X | X | X | X | X | O | X | O | X | O | X | O | X | O | X | X | X | X | X |
| R5 | X | X | X | X | O | X | O | X | O | O | X | X | X | X | X | X | X | X | X | X |
| R6 | X | X | X | O | X | X | X | X | X | X | X | X | X | X | X | O | O | O | X | X |
| R7 | X | X | X | X | X | O | O | X | X | X | X | X | X | X | X | O | O | X | O | X |
| R8 | X | X | X | X | O | X | X | X | X | O | O | X | X | X | X | O | O | X | O | X |
| R9 | X | X | X | X | X | X | X | X | X | O | X | X | X | X | X | X | X | O | X | X |
| R10 | O | O | X | X | X | X | X | O | X | O | X | X | X | X | X | X | X | X | X | X |
| R11 | O | X | O | X | X | X | O | X | X | O | X | X | X | X | X | X | X | X | O | X |
| R12 | O | X | X | X | X | X | X | O | X | O | X | X | X | X | X | X | X | X | O | X |
| R13 | O | O | X | X | X | X | X | X | O | X | X | X | X | X | X | X | X | X | O | X |
| R14 | O | O | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X |
| R15 | X | X | X | X | X | O | O | X | X | X | X | X | X | X | X | X | X | X | X | X |
| R16 | X | X | X | X | X | O | O | O | X | X | X | X | X | X | X | X | X | X | X | X |
| R17 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X |
| R18 | X | X | O | O | O | X | O | X | X | X | X | X | X | X | X | X | X | X | X | X |
| R19 | X | X | X | O | O | O | X | X | X | X | X | X | O | O | X | X | X | X | X | X |
| R20 | X | X | X | X | O | X | X | X | X | X | X | X | O | O | X | X | X | X | X | X |