Now, it's worth thinking about what permutations are counting. Now, remember, we care, when we're talking about permutations, we care about who's sitting in which chair. So, for example, this is one permutation, and this would be counted as another permutation. And this would be counted as another permutation. This would be counted as another permutation. So notice, these are all the same three people, but we're putting them in different chairs. And this counted that.