Pause this video and see if you can figure it out on your own. Well, there are several ways to approach this. One way is to just try to think through all of the possibilities. You could do it systematically. You could say, all right, if I have person A in seat number one, then I could have person B in seat number two and person C in seat number three. And I could think of another situation. If I have person A in seat number one, I could then swap B and C, so it could look like that.