input:

3
1
111
110110
1101010
1111
111111

output:

5
0 1
1 2
0 1
1 2
2 3
11
2 3
5 6
5 6
5 6
6 7
6 7
7 8
4 5
5 6
2 3
3 4
6
3 4
3 4
4 5
4 5
4 5
5 6

result:

wrong answer Integer parameter [name=l] equals to 0, violates the range [1, 128] (test case 1)