The word sateto is not there?

I can't find that word ʕ⁠´⁠•⁠ᴥ⁠•⁠`⁠ʔ

This word is さてと

さてと is comprised of

さ(さ)て(て) - well, now, then

and

と(と)- a connective particle between two actions,

Put together it means something like, "well, then", or "moving on".  You use it when you want to finish one action and then start another.

さてと、帰りましょう

well then, let's go home