1
8
1/1 2/1 0/1
3/1 2/1 0/1
3/1 0/1 0/1
1/1 0/1 0/1
1/1 0/1 4/1
3/1 0/1 4/1
3/1 2/1 4/1
1/1 2/1 4/1