| Count | Prefix |
|---|---|
| 4,249 | x- |
| 31 | x. |
| 180 | x0 |
| 410 | x1 |
| 471 | x2 |
| 368 | x3 |
| 237 | x4 |
| 174 | x5 |
| 99 | x6 |
| 100 | x7 |
| 172 | x8 |
| 105 | x9 |
| 5,192 | xa |
| 2,112 | xb |
| 3,599 | xc |
| 1,575 | xd |
| 6,121 | xe |
| 1,534 | xf |
| 1,063 | xg |
| 1,236 | xh |
| 10,353 | xi |
| 980 | xj |
| 562 | xk |
| 2,784 | xl |
| 3,992 | xm |
| 3,052 | xn |
| 3,660 | xo |
| 5,714 | xp |
| 459 | xq |
| 2,108 | xr |
| 3,516 | xs |
| 5,669 | xt |
| 2,131 | xu |
| 718 | xv |
| 838 | xw |
| 6,319 | xx |
| 2,893 | xy |
| 731 | xz |