Neuter stems ending in -an (paradigm kamman-, action):
Sg.
Pl.
Nom.
kamma
kammāni
Acc.
kamma
kammāni
Gen.
kammuno
kammānaṃ
Dat.
kammuno
kammānaṃ
Ins.
kammunā/kammanā
kammehi/kammebhi
Abl.
kammunā/kammanā
kammehi/kammebhi
Loc.
kammani
kammesu