And we've already covered this in a previous video. But now let's do something maybe more interesting, or maybe you might find it less interesting. Let's say that we still have, let's still say we have these five people, but we don't have as many chairs, so not everyone is going to be able to sit down. So let's say that we only have three chairs. So we have chair one, we have chair two, and we have chair three. So how many ways can you have five people where only three of them are going to sit down in these three chairs? And we care which chair they sit in, and I encourage you to pause the video and think about it.