And the question is, what is the probability that at least two people have the same birthday? And this is kind of a fun question because, I don't know, that's the size of a lot of classrooms. What's the probability that at least someone in the classroom shares a birthday with someone else in the classroom? And that's actually another good way to phrase it well. This is the same thing as saying, what is the probability that someone shares with at least someone else? They could share it with two other people or four other people on the birthday. Someone else.