りんぽうかいでしょう
輪宝貝でしょう
rimpōkaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of りんぼうがい

1. Probably a whelk.; Probably a turban shell.

Polite
Presumptive
Conjecture
Usually Written in Kana