| Singular | Plural | |
|---|---|---|
| Nominativ | conger, gonger, coger, conger | congri, gongri, congri |
| Genitiv | congri, gongri, congri | congrum, gongrum, congrum, congrorum, gongrorum, congrorum |
| Dativ | congro, gongro, congro | congris, gongris, congris |
| Akkusativ | congrum, congrom, gongrom, congrom, congrum, gongrum | congros, congros, gongros |
| Ablativ | congro, gongro, congro | congris, gongris, congris |
| Vokativ | conger, gonger, coger, conger | congri, gongri, congri |