15 53
1 3
1 6
1 7
1 9
1 12
1 13
2 3
2 5
2 7
2 8
2 9
2 11
2 14
2 15
3 4
3 5
3 8
3 10
3 12
3 13
3 14
3 15
4 5
4 8
4 10
4 12
4 13
5 6
5 7
5 8
5 9
5 10
5 13
5 14
6 11
6 12
6 13
6 14
7 8
7 13
7 15
8 9
8 10
8 11
9 11
9 12
10 11
10 12
11 15
12 14
12 15
13 14
13 15
0 0 1 0 0 1 1 0 1 0 0 1 1 0 0 
0 0 1 0 1 0 1 1 1 0 1 0 0 1 1 
1 1 0 1 1 0 0 1 0 1 0 1 1 1 1 
0 0 1 0 1 0 0 1 0 1 0 1 1 0 0 
0 1 1 1 0 1 1 1 1 1 0 0 1 1 0 
1 0 0 0 1 0 0 0 0 0 1 1 1 1 0 
1 1 0 0 1 0 0 1 0 0 0 0 1 0 1 
0 1 1 1 1 0 1 0 1 1 1 0 0 0 0 
1 1 0 0 1 0 0 1 0 0 1 1 0 0 0 
0 0 1 1 1 0 0 1 0 0 1 1 0 0 0 
0 1 0 0 0 1 0 1 1 1 0 0 0 0 1 
1 0 1 1 0 1 0 0 1 1 0 0 0 1 1 
1 0 1 1 1 1 1 0 0 0 0 0 0 1 1 
0 1 1 0 1 1 0 0 0 0 0 1 1 0 0 
0 1 1 0 0 0 1 0 0 0 1 1 1 0 0 
NO