That's the event. And all of these different ways, that's sometimes called the event space. But we actually want to count how many ways that if I get a hand of nine, picking from 36, that I can get the four ones in it, so this is the number of ways in which my event can happen. And we want to divide that into all of the possibilities. Or maybe I should write it this way. The total number of hands that I can get. So the numerator in blue is the number of hands, or the number of different hands, where I have the four ones, and we're dividing it to divide the total number of hands.