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 2/1
3/2 1/2 2/1
3/2 3/2 2/1
1/2 3/2 2/1