おすしだじゃなかったです
雄羊歯じゃなかったです
osushidajanakattadesu

Noun
Desu Copula

The polite, past negative form of おしだ

1. Wasn't a male sheep tooth.; Wasn't a ram's tooth.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana