| B1 | B2 | B3 | B4 | B5 |
B1 | 1 | 4 | 9 | 8 | 7 |
B2 | 1/4 | 1 | 7 | 3 | 5 |
B3 | 1/9 | 1/7 | 1 | 1/4 | 1/2 |
B4 | 1/8 | 1/3 | 4 | 1 | 3 |
B5 | 1/7 | 1/5 | 2 | 1/3 | 1 |