Minus 1 in 2,600. And this simplifies to, let's see, this is 1 minus 1 over 26 plus 1 in 2,600, plus or minus 1 in 2,600. These cancel and you're left with 1 in 1 in 2,600. Now, why does this make sense? Well, the way you lose, the way you get nothing, is if you get the letter wrong. So you have a 1 in 26 chance of getting the letter right, and then you're going to be in one of these two categories. Or you have a 1 minus 1 in 26, which is equal to 25 out of 26.