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