input:

5503
10
19
2 4
2 8
8 3
8 4
8 7
2 7
2 6
1 5
3 2
6 4
2 1
4 5
2 5
7 1
4 7
5 7
2 2
8 6
8 1
12
5 1
4 8
5 2
6 1
3 6
1 1
1 7
7 2
5 6
6 8
1 2
3 5
10
5
9 5
10 7
6 6
5 7
1 3
9
6 8
8 8
6 4
2 9
5 4
4 2
10 9
2 3
2 1
7
1
4 3
14
4 6
6 1
2 1
7 6
2 3
4 4
5 3
6 5
1 4
3 4
3 2
6 2
8 6
8 2
6
6
5 2
5 1
3 1
2 3
7 4
5 5
3
...

output:

4
4 6
5 2
8 3
1 2
8 1
2 2
9 1
2 3
1 1
7 2
1 3

result:

wrong answer 1st numbers differ - expected: '2', found: '4'