1
8
-1/2 3/2 -1/1
3/2 3/2 -1/1
3/2 -1/2 -1/1
-1/2 -1/2 -1/1
-1/2 -1/2 1/1
3/2 -1/2 1/1
3/2 3/2 1/1
-1/2 3/2 1/1