So the probability of each of the combinations is 1 half to the 6th power. And so how many combinations are there like this, where you get, out of the 6 flips, you're choosing, you're essentially choosing 4 heads. You're choosing, I'm, once again, the god of probability. I am picking 4, exactly 4, of the 6 heads. Sorry, I'm picking 4 of exactly 6 of the flips to end up heads. I'm choosing which of the flips get selected, so to speak. So it's essentially, there are going to be, out of 6 flips, I'm choosing, as the god of probability, 4 to be heads.