Even though we've picked the same four colors, we're going to assume that these are two different codes. And that makes sense because we're dealing with codes. These are different codes. This would count as two different codes right here, even though we've picked the same actual colors, the same four colors. We've picked them in different orders. With that out of the way, let's think about how many different ways we can pick four colors. Let's say we have four slots here.