| Count | Prefix |
|---|---|
| 223 | cf- |
| 21 | cf. |
| 6 | cf0 |
| 19 | cf1 |
| 24 | cf2 |
| 12 | cf3 |
| 6 | cf4 |
| 7 | cf5 |
| 19 | cf6 |
| 13 | cf7 |
| 12 | cf8 |
| 8 | cf9 |
| 815 | cfa |
| 291 | cfb |
| 692 | cfc |
| 364 | cfd |
| 315 | cfe |
| 213 | cff |
| 296 | cfg |
| 205 | cfh |
| 525 | cfi |
| 70 | cfj |
| 62 | cfk |
| 371 | cfl |
| 493 | cfm |
| 204 | cfn |
| 810 | cfo |
| 485 | cfp |
| 24 | cfq |
| 329 | cfr |
| 734 | cfs |
| 331 | cft |
| 137 | cfu |
| 73 | cfv |
| 167 | cfw |
| 74 | cfx |
| 44 | cfy |
| 21 | cfz |