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

result:

wrong answer Integer 4 violates the range [1, 3] (test case 17)