input:

10000
15 14
13 12
5 4
9 8
11 12
15 14
10 9
14 13
2 3
2 1
6 5
10 11
3 4
7 6
8 7
6 5
2 1
2 4
4 6
2 3
3 5
10 9
8 3
9 4
5 6
5 10
3 2
5 4
2 7
1 2
4 3
2 1
2 1
2 1
2 1
9 8
9 8
5 4
1 2
6 5
3 4
3 2
7 8
7 6
2 1
1 2
14 13
3 10
5 6
2 9
11 4
2 3
2 1
8 7
13 6
5 4
5 12
6 7
4 3
7 14
16 15
2 3
2 1
6 10
6 9
6 4
9 11
...

output:

4
5 11 15 1 
2
4 5 
1
4 
1
1 
1
1 
2
3 8 
1
1 
3
3 13 7 
3
4 15 13 
1
14 
3
4 9 16 
4
7 1 5 8 
1
4 
2
16 7 
1
3 
3
12 3 7 
3
3 5 7 
1
1 
4
7 5 9 1 
1
6 
2
1 4 
3
1 8 7 
4
14 9 11 12 
3
6 17 13 
1
3 
4
9 14 5 1 
2
5 4 
3
10 6 12 
2
3 1 
1
2 
5
11 6 21 1 16 
5
12 6 4 1 7 
3
7 9 11 
5
3 14 16 7 8 
1
2 ...

result:

wrong answer Integer 4 violates the range [1, 3] (test case 12)