And we care which chair they sit in, and I encourage you to pause the video and think about it. So I am assuming you have had your go at it. So let's use the same logic. So how many, if we seat them in order, we might as well, how many different people, if we haven't sat anyone yet, how many different people could sit in seat one? Well, we could have, if no one sat down, we have five different people. Well, five different people could sit in seat one. Well, for each of these scenarios where one person has already sat in seat one, how many people could sit in seat two?