水金すいきん火木かもく天海てんかいでしょう
sui kinchikamo kudotenkaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 水金地火木土天海

1. Probably water, gold, earth, fire, wood, soil, heaven, sea.

Polite
Presumptive
Conjecture