ドレミファソラシドでしょう
doremifa sorashidodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ドレミファソラシド

1. Do-re-mi-fa-so-la-ti-do, perhaps.; It will likely be do-re-mi-fa-so-la-ti-do.

Polite
Presumptive
Conjecture