3. feminine stems ending in -a (paradigm sena-, army):
 
  Sg. Du. Pl.
Nom. sena sene senah
Acc. senam sene senah
Ins. senaya senabhyam senabhih
Dat. senayai senabhyam senabhyah
Abl. senayah senabhyam senabhyah
Gen. senayah senayoh senanam
Loc. senayam senayoh senasu
Voc. sene sene senah