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