input:

4
1234
2345
3456
4567

output:

1 2 3
2 3 4
3 4 5
4 5 6
1 2 4
2 3 5
3 4 6
4 5 7
1 3 4
2 4 5
3 5 6
4 6 7
2 3 4
3 4 5
4 5 6
5 6 7
4

result:

wrong answer 1st lines differ - expected: '4', found: '1 2 3'