任意 にんい選択 せんたく構成 こうせい要素 ようそでしょう
nin'isentakukōseiyō sodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 任意選択構成要素

1. Probably optional element.; Likely a selectable component.

Polite
Presumptive
Conjecture
Computing