| Count | Prefix |
|---|---|
| 644 | ex- |
| 24 | ex. |
| 12 | ex0 |
| 35 | ex1 |
| 50 | ex2 |
| 19 | ex3 |
| 16 | ex4 |
| 9 | ex5 |
| 5 | ex6 |
| 6 | ex7 |
| 7 | ex8 |
| 3 | ex9 |
| 3,644 | exa |
| 227 | exb |
| 10,932 | exc |
| 185 | exd |
| 7,246 | exe |
| 243 | exf |
| 127 | exg |
| 1,288 | exh |
| 3,174 | exi |
| 33 | exj |
| 117 | exk |
| 322 | exl |
| 453 | exm |
| 198 | exn |
| 4,293 | exo |
| 27,153 | exp |
| 494 | exq |
| 175 | exr |
| 647 | exs |
| 10,786 | ext |
| 275 | exu |
| 104 | exv |
| 105 | exw |
| 570 | exx |
| 107 | exy |
| 100 | exz |