This is 1, 2, 3, and then you're going to go all the way to n minus k minus 1. You could try this out in the case of 5. When n was 5 and k was 3, this resulted in 5 times 4 times 3. That was this term right over here. I'm doing a case that is a little bit longer, where k is a slightly larger number, because this right over here is 5 minus 2. That is this one over here. Just not to confuse you, let me write it like this.