And now we want to find the intersection. We need to find the intersection of A and this business. Let me write that down. So it's going to be A intersected with the relative complement of C in B and the absolute complement of that. So this is going to be the intersection of the set A and the set of all things in the universe that are neither a 0 or a blue. So it's essentially the things that satisfy both of these, that it has to be in set A and it has to be in the set of all things in the universe that are neither a 0 or a blue. So let's think about what this is.