半角 はんかく英数字 えうすうじじゃなかったです
hankakueusūjijanakattadesu

Noun
Desu Copula

The polite, past negative form of 半角英数字

1. Wasn't half-width alphanumeric.; Wasn't single-byte alphanumeric.

Past/Perfective
Negative
Polite
Casual Register
Computing