And you could say this is five, and we're choosing five of them to be heads out of the 32 equally likely possibilities. Well, five choose five, that's going to be, actually let me just write it here, since I've done it for all the other ones. Five choose five is five factorial over five factorial times five minus five factorial. Well, this right over here is zero factorial, which is equal to one, and so this whole thing simplifies to one. So this is going to be one out of 130 seconds. And so you see the symmetry, 130 second, 130 seconds, 532nd, 532nd, 1032nd, 1032nd. And that makes sense, because the probability of getting five heads is the same as the probability of getting zero tails.