| Count | Prefix |
|---|---|
| 171 | rp- |
| 22 | rp. |
| 13 | rp0 |
| 15 | rp1 |
| 19 | rp2 |
| 10 | rp3 |
| 7 | rp4 |
| 11 | rp5 |
| 6 | rp6 |
| 10 | rp7 |
| 10 | rp8 |
| 5 | rp9 |
| 388 | rpa |
| 117 | rpb |
| 381 | rpc |
| 154 | rpd |
| 194 | rpe |
| 107 | rpf |
| 834 | rpg |
| 167 | rph |
| 263 | rpi |
| 31 | rpj |
| 81 | rpk |
| 207 | rpl |
| 882 | rpm |
| 97 | rpn |
| 162 | rpo |
| 157 | rpp |
| 15 | rpq |
| 216 | rpr |
| 435 | rps |
| 154 | rpt |
| 57 | rpu |
| 57 | rpv |
| 87 | rpw |
| 25 | rpx |
| 18 | rpy |
| 30 | rpz |