先入 さきい先出 さきだしリストだったら
sakiiresakidashirisutodattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 先入れ先出しリスト

1. If it were a first-in, first-out list.; If it's a first-in, first-out list.

Tara Conditional
Computing