Index | B5 | B6 | B7 | B8 | B9 |
B5 | 1 | 1/2 | 1/3 | 2 | 1/3 |
B6 | 2 | 1 | 1/2 | 2 | 1/2 |
B7 | 3 | 2 | 1 | 3 | 1/2 |
B8 | 1/2 | 1/2 | 1/3 | 1 | 1/3 |
B9 | 3 | 2 | 2 | 3 | 1 |