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:

2
11 2 
1
1 
1
2 
0

0

1
6 
0

1
4 
1
10 
0

2
15 4 
1
3 
1
2 
1
5 
0

2
11 2 
1
1 
0

1
2 
0

1
2 
1
3 
1
4 
1
5 
0

2
11 2 
1
1 
1
5 
1
1 
0

2
16 5 
1
2 
1
4 
1
7 
0

1
3 
1
2 
1
3 
2
7 6 
0

1
8 
1
1 
1
3 
1
2 
0

1
6 
1
3 
1
3 
1
5 
0

2
13 2 
1
1 
1
3 
1
4 
0

2
12 3 
1
2 
1
2 
1
1 
0

1
2 
1...

result:

wrong answer Integer 0 violates the range [1, 2] (test case 4)