So, in this molecule, we have the HS are on the opposite sides, and the x and Y are also on the opposite sides. So we have the following picture. So we have the two HS being on different sides, and we have the Y and the X also being on different sides. So trans is defined the following way. Hydrogens are on different sides of the plane, x and x, I mean H and H different sides. And E is defined as the heavier groups are in different sides.