So it's equal to that right over there. So let's be clear. The probability of picking the unfair coin and then getting four heads in a row is this top number. It's like roughly 6.9% chance that you get the unfair coin and then get four heads in a row. The probability that you get the fair coin and then get four heads in a row is even lower. It's only a 1.6% chance. Now, the probability of getting four heads in a row either way is going to be the sum of this and this, or the sum of that and that, which is going to be.