4
5 5 2 3 
7 1 2 3
7 1 9 4
5 5 9 4
4
5/1 5/1 2/1 3/1
7/1 1/1 2/1 3/1
7/1 1/1 9/1 4/1
5/1 5/1 9/1 4/1
4
2/1 3/1
5/1 5/1
7/1 1/1
9/1 4/1
0
2
4
5/1 5/1 2/1 3/1
7/1 1/1 2/1 3/1
7/1 1/1 9/1 4/1
5/1 5/1 9/1 4/1
