So in our example, we saw there was 360 ways of seating six people into four chairs. But what if we didn't care about who's sitting in which chairs, and we just want to say, how many ways are there to choose four people from a pool of six? Well, that would be, that would be how many ways are there, so that would be six, how many combinations, if I'm starting with a pool of six, how many combinations are there, how many combinations are there for selecting four? Or another way of thinking about it is, how many ways are there to, from a pool of six items, people in this example, how many ways are there to choose four of them? And that is going to be, you know, we could do it, you know, well, I'll apply the formula first, and then I'll reason through it. And like I always say, I don't, I'm not a huge fan of the formula. Every time I, you know, I revisit it after a few years, I actually just rethink about it as opposed to memorizing it, because memorizing is a good way to not understand what's actually going on.