| Count | Prefix |
|---|---|
| 44 | qc- |
| 15 | qc. |
| 2 | qc0 |
| 13 | qc1 |
| 9 | qc2 |
| 3 | qc3 |
| 5 | qc4 |
| 2 | qc5 |
| 1 | qc6 |
| 3 | qc7 |
| 3 | qc8 |
| 2 | qc9 |
| 191 | qca |
| 55 | qcb |
| 178 | qcc |
| 73 | qcd |
| 88 | qce |
| 52 | qcf |
| 42 | qcg |
| 131 | qch |
| 116 | qci |
| 17 | qcj |
| 18 | qck |
| 104 | qcl |
| 124 | qcm |
| 36 | qcn |
| 257 | qco |
| 80 | qcp |
| 13 | qcq |
| 84 | qcr |
| 172 | qcs |
| 81 | qct |
| 35 | qcu |
| 18 | qcv |
| 51 | qcw |
| 13 | qcx |
| 23 | qcy |
| 16 | qcz |