うむしゅむこっぱいじゃなかったです
宇牟須牟骨牌じゃなかったです
umu shumukoppaijanakattadesu

Noun
Desu Copula

The polite, past negative form of うんすんかるた

1. It wasn't Umu Sumu Bone.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana