7 9 2
1 0
2 0
1 2
5 1
1 6
4 2
3 4
6 3
6 4
0 1 
1 0 
1 0 
0 0 
1 1 
1 1 
1 0 
2 0 
3 2 
2 2 
2 1 
2 0 
1 0 
2 1 
5 4 
7 3 
7 2 
4 1 
6 4 
3 2 
7 3