case 1 failed
input:
6 9 3
3 4 6
expected:1 2
1 4
1 5
1 6
2 4
2 5
2 6
4 5
3 1
got:1 2
1 3
1 4
1 5
1 6
2 3
2 4
2 5
2 6
exit status 1