I just kind of reasoned through it again. I mean, you could literally say, okay, four times three is 12, we're double counting, because there's two ways to arrange two people, so you just divided it by two. So you just divide by two. And then you are going to be left with six. You could think of it in terms of this. Or you could just apply the formula. You could just say, hey look, four choose two, or the number of combinations of selecting two from a group of four.