2
1 10
10 1
0
0
2
10 2
2 10
0
2
9 5
5 9
0
0
2
10 3
3 10
0
0
0
2
7 8
8 7
0
0
2
10 4
4 10
2
6 9
9 6
0
0
0
2
0 11
11 0
2
1 11
11 1
0
0
4
11 2
5 10
10 5
2 11
0
0
1
8 8
0
4
3 11
7 9
9 7
11 3
0
0
0
0
0
2
6 10
10 6
2
11 4
4 11
0
0
0
0
0
0
2
0 12
12 0
4
1 12
9 8
8 9
12 1
2
11 5
5 11
0
2
12 2
2 12
2
10 7
7 10
0
0
0
2
12 3
3 12
0
0
0
2
11 6
6 11
0
0
2
12 4
4 12
0
1
9 9
0
2
10 8
8 10
0
0
0
0
4
12 5
0 13
13 0
5 12
4
11 7
13 1
1 13
7 11
0
0
2
13 2
2 13
0
0
0
0
2
3 13
13 3
0
2
6 12
12 6
2
9 10
10 9
0
0
0
4
4 13
8 11
11 8
13 4
0
0
0
0
0
0
0
2
7 12
12 7
2
5 13
13 5
0
2
0 14
14 0
2
14 1
1 14
0
0
3
2 14
10 10
14 2