We could write out all of the 32 possibilities and literally just count the heads, but let's just use that other technique that we just started to explore in that last video. We have five flips here. So let me draw the flips. 1, 2, 3, 4, 5. And we want to have exactly three heads. And I'm going to call those three heads, I'm going to call them, let me do it in pink, heads A, heads B, heads C, just to give them a name. Although what we're going to see later in this video is that we don't want to differentiate between them.