| · | a | b | d | y1 | y2 | u1 | u2 | v1 | v2 |
| a | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a | a |
| b | 0 | a | 0 | 0 | 0 | a | a | b | b |
| d | 0 | 0 | d | d | d | d | d | 0 | 0 |
| y1 | 0 | 0 | d | d | d | d | d | a | a |
| y2 | 0 | 0 | d | d | d | d | d | a | a |
| u1 | 0 | a | d | d | d | y1 | y1 | b | b |
| u2 | 0 | a | d | d | d | y1 | y1 | b | b |
| v1 | a | b | 0 | a | a | b | b | v1 | v1 |
| v2 | a | b | 0 | a | a | b | b | v1 | v1 |