返信 へんしん りょう封筒 ふうとうではありませんでした
henshinryōfūto udewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 返信料封筒

1. It was not a reply envelope.; It wasn't the reply envelope.

Past/Perfective
Negative
Polite
Formal Register