0 0 0 a 1/2 1/2 1/2 a 0 0 1/2 b 1/2 1/2 0 b 0 1/2 1/4 c 1/2 0 3/4 c 0 1/2 3/4 d 1/2 0 1/4 d 0 0 z e 0 0 -z e 1/2 1/2 z+1/2 e 1/2 1/2 -z+1/2 e x -x+1/2 1/4 f -x x+1/2 1/4 f -x+1/2 -x 3/4 f x+1/2 x 3/4 f x x+1/2 1/4 g -x -x+1/2 1/4 g x+1/2 -x 3/4 g -x+1/2 x 3/4 g 0 1/2 z h 1/2 0 -z h 1/2 0 z+1/2 h 0 1/2 -z+1/2 h x y z i -x -y z i y -x -z i -y x -z i x+1/2 -y+1/2 z+1/2 i -x+1/2 y+1/2 z+1/2 i y+1/2 x+1/2 -z+1/2 i -y+1/2 -x+1/2 -z+1/2 i