たんこぶじゃなかったです
たん瘤じゃなかったです
tankobujanakattadesu

Noun
Desu Copula

The polite, past negative form of たんこぶ

1. It wasn't a wart.; It wasn't a tumor.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana