| Count | Prefix |
|---|---|
| 17 | qb- |
| 11 | qb. |
| 1 | qb0 |
| 6 | qb1 |
| 12 | qb2 |
| 6 | qb3 |
| 11 | qb4 |
| 3 | qb5 |
| 6 | qb6 |
| 1 | qb7 |
| 4 | qb8 |
| 1 | qb9 |
| 152 | qba |
| 32 | qbb |
| 82 | qbc |
| 50 | qbd |
| 140 | qbe |
| 31 | qbf |
| 21 | qbg |
| 21 | qbh |
| 212 | qbi |
| 8 | qbj |
| 13 | qbk |
| 54 | qbl |
| 35 | qbm |
| 23 | qbn |
| 134 | qbo |
| 42 | qbp |
| 10 | qbq |
| 77 | qbr |
| 132 | qbs |
| 57 | qbt |
| 68 | qbu |
| 13 | qbv |
| 16 | qbw |
| 6 | qbx |
| 23 | qby |
| 10 | qbz |