And so what we need to do is divide this by all of the different ways that you can arrange three things. So if I have three things that are in three spaces, so here I have heads in the second flip, third flip, and fifth flip. If I have three things in three spaces like this, how many ways can I arrange them? And so if I have three spaces, how many ways can I arrange an A, B, and C in those three spaces? Well, A can go into three spaces. It can go into any of the three. A can go into any of the three spaces.