C also has a gold star, so we take the gold star out. So the relative complement of C in B is just the set of 0 and this blue written in blue. So let me write this down. Now it gets interesting. We're going to take the absolute complement of that. So let me write this down. So B, the absolute complement of this business is going to be all things, let me write this, the set of all things in our universe that are neither a 0 or a blue.