Sam: I don't know the number on my hat.

Pete: I don't know the number on my hat.

Sam: I don't know the number on my hat.

Pete: I don't know the number on my hat.

Sam: I don't know the number on my hat.

Pete: I don't know the number on my hat.

Sam: OK, now I know the number on my hat.

Pete: And I know the number on mine.

What are the numbers on Pete's and Sam's hats?