input:

9
8 10
1 2
1 3
1 4
1 5
1 6
1 7
8 4
8 5
8 6
8 7
10 12
1 2
1 3
1 4
1 5
1 6
1 7
8 4
8 5
8 6
8 7
8 9
8 10
11 13
1 2
1 3
1 4
1 5
1 6
1 7
8 4
8 5
8 6
8 7
8 9
8 10
1 11
11 14
1 2
1 3
1 4
1 5
1 6
1 7
8 4
8 5
8 6
8 7
8 9
8 10
1 11
1 8
10 45
5 10
2 9
5 8
3 10
2 10
4 9
4 3
4 2
5 6
7 1
10 6
10 7
6 1
8 3
5 1
7 5...

output:

1
2
4
9
63000
0
624414727
928162958
544682070

result:

wrong answer 4th lines differ - expected: '4', found: '9'