AThe first one applies to the top, the second one to the left and right, and third one to the bottom.
BThe first one applies to the left, the second one to the top and bottom, and third one to the right.
CThe first one applies to the right, the second one to the top and bottom, and third one to the left.
DThe first one applies to the bottom, the second one to the left and right, and third one to the top.