And I could even draw the elements of set x. So you have 3 and 5 and 12, 3, 5, 12, and 13. And then we can draw a set y. And notice, I drew a little overlapping here because they overlap at 3. 3 is an element in both set x and set y. But set y also has the numbers 14, 15, and 6. And so when we're talking about x intersect y, we're talking about where the two sets overlap.