And I believe we are done after that. So if we count them, 1, 2, 3, 4, 5, 6 of the possibilities have exactly 2 heads. So 6 of the 16 equally likely possibilities have 2 heads. So we have a 3 8th chance of getting exactly 2 heads. Now, that's kind of what we've been doing in the past. But what I want to do is think about a way so we wouldn't have to write out all the possibilities. And the reason why that's useful is we're only dealing with 4 flips now.