| Count | Prefix |
|---|---|
| 418 | 1st- |
| 12 | 1st. |
| 1 | 1st0 |
| 11 | 1st1 |
| 20 | 1st2 |
| 3 | 1st3 |
| 67 | 1st4 |
| 2 | 1st5 |
| 1 | 1st6 |
| 1 | 1st7 |
| 1 | 1st8 |
| 2 | 1st9 |
| 293 | 1sta |
| 177 | 1stb |
| 904 | 1stc |
| 154 | 1std |
| 209 | 1ste |
| 227 | 1stf |
| 89 | 1stg |
| 114 | 1sth |
| 145 | 1sti |
| 14 | 1stj |
| 24 | 1stk |
| 132 | 1stl |
| 206 | 1stm |
| 120 | 1stn |
| 550 | 1sto |
| 303 | 1stp |
| 20 | 1stq |
| 176 | 1str |
| 329 | 1sts |
| 139 | 1stt |
| 61 | 1stu |
| 40 | 1stv |
| 133 | 1stw |
| 6 | 1stx |
| 7 | 1sty |
| 4 | 1stz |