You could get your heads. So this is equal to the probability of getting the heads in the first flip plus the probability of getting the heads in the second flip plus the probability of getting the heads in the third flip. Remember, exactly 1 heads. We're not saying at least 1, exactly 1 heads. So probability in the third flip. And then, or the possibility that you get heads in the fourth flip. Tails, heads, and tails.