どうくつくまでしょう
洞窟熊でしょう
dōkutsukumadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ほらあなぐま

1. Cave bear, likely.; Probably a cave bear.

Polite
Presumptive
Conjecture
Usually Written in Kana