| Neighbor | А1 | А2 | B1 | С1 | С2 |
| А1 | 0 | 0 | 1 | 1 | 1 |
| А2 | 0 | 0 | 1 | 0 | 1 |
| B1 | 1 | 1 | 0 | 0 | 1 |
| С1 | 1 | 0 | 0 | 0 | 0 |
| С2 | 1 | 1 | 1 | 0 | 0 |