| Nominative | koks |
| Genitive | koksu; koksa |
| Dative | koksowi |
| Accusative | koks; koksa |
| Instrumental | koksem |
| Locative | koksie |
| Vocative | koksie |
| Nominative | koksi; koksy |
| Genitive | koksów |
| Dative | koksom |
| Accusative | koksów |
| Instrumental | koksami |
| Locative | koksach |
| Vocative | koksi |