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