What do the rules of the Russian language say?

Question

IT education

Hello! Please tell me how to correctly punctuate this sentence:

Until then, you can guess what it is.

I apologize for writing on Habr, but here you can get an answer faster :) And besides, there seem to be a lot of philologists here.
UPD: after the decision, someone put a "minus" and shit in karma. It seems like people don't like it when someone tries to learn. Sadly.

Answer 1

Until then, you can guess what it is. Perhaps so.