| Count | Prefix |
|---|---|
| 12 | effe- |
| 8 | effe. |
| 1 | effe1 |
| 2 | effe2 |
| 2 | effe3 |
| 1 | effe4 |
| 1 | effe5 |
| 4 | effea |
| 15 | effeb |
| 1,181 | effec |
| 21 | effed |
| 10 | effee |
| 11 | effef |
| 32 | effeg |
| 4 | effei |
| 87 | effek |
| 13 | effel |
| 19 | effem |
| 45 | effen |
| 1 | effeo |
| 17 | effep |
| 3 | effeq |
| 69 | effer |
| 14 | effes |
| 91 | effet |
| 6 | effeu |
| 6 | effev |
| 1 | effew |
| 59 | effex |
| 1 | effey |
| 3 | effez |