input:

1000
7
3 6
4 3
5 3
2 6
1 4
7 1
12
5 7
10 7
2 10
11 2
1 7
8 1
4 2
9 11
6 9
12 11
3 5
6
2 5
1 2
4 5
6 4
3 6
5
2 5
1 5
4 5
3 2
8
1 8
2 8
4 2
6 1
5 6
7 6
3 8
8
3 8
7 3
4 8
6 4
2 7
5 2
1 4
4
3 1
4 3
2 1
6
5 1
6 1
2 5
3 5
4 2
12
8 11
5 11
12 8
3 12
6 12
2 3
4 6
10 11
1 5
9 5
7 5
9
6 1
7 6
4 7
8 7
5 4
9 6
...

output:

248995192
754412402
816342051
918384806
711758412
80216067
776412276
869581749
911849011
802600786
616200220
650091232
266638494
362539618
71479228
792187002
73103755
584006902
516622265
221832080
812391241
56023919
867301808
183319566
698771049
208558822
840004139
688839536
310564911
286902823
3681...

result:

wrong answer 1st lines differ - expected: '948445317', found: '248995192'