B1 | C1 | C2 | C3 | C4 |
C1 | 1 | 1/2 | 2 | 3 |
C2 | 2 | 1 | 4 | 3 |
C3 | 1/2 | 1/4 | 1 | 1 |
C4 | 1/3 | 1/3 | 1 | 1 |