さるのこしかけでしょう
猿の腰掛けでしょう
sarunokoshikakedeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of さるのこしかけ

1. Probably a monkey's seat.; Likely a makeshift seat.

Polite
Presumptive
Conjecture
Usually Written in Kana