後入 あとい先出 さきだしリストであれば
atoiresakidashirisutodeareba

Noun
Da Copula

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

1. If it were a last-in, first-out list.; If it is a last-in, first-out list.

Ba Conditional
Computing