| Count | Prefix |
|---|---|
| 160 | gis- |
| 30 | gis. |
| 1 | gis0 |
| 4 | gis1 |
| 9 | gis2 |
| 4 | gis3 |
| 17 | gis4 |
| 2 | gis5 |
| 2 | gis7 |
| 1 | gis9 |
| 106 | gisa |
| 87 | gisb |
| 159 | gisc |
| 63 | gisd |
| 263 | gise |
| 36 | gisf |
| 37 | gisg |
| 75 | gish |
| 90 | gisi |
| 7 | gisj |
| 32 | gisk |
| 87 | gisl |
| 110 | gism |
| 41 | gisn |
| 63 | giso |
| 84 | gisp |
| 5 | gisq |
| 23 | gisr |
| 122 | giss |
| 276 | gist |
| 44 | gisu |
| 8 | gisv |
| 47 | gisw |
| 6 | gisx |
| 15 | gisy |
| 7 | gisz |