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 |