あかうそじゃなかったです
赤鷽じゃなかったです
akausojanakattadesu

Noun
Desu Copula

The polite, past negative form of あかうそ

1. Wasn't a red-billed starling.; Wasn't a cuckoo.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana