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