So five minus three, that gave me two left over. So I could write it like this. I could write it as five, let me use those same colors. I could write it as five factorial over, over five minus three, which of course is two. Five minus three factorial. And so another way of thinking about it, if we wanted to generalize, is if you're trying to put, if you're trying to figure out the number of permutations, and there's a bunch of notations for writing this. If you're trying to figure out the number of permutations where you could put n people in r seats, or the number of permutations, you could put n people in r seats, and there's other notations as well.