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:

948445317
941869675
550143557
918384806
171891568
487662742
776412276
869581749
350393854
663955737
211048577
887328316
890334966
829120312
528946270
554580198
8020790
122234004
908525604
807222287
433351719
56023919
660874735
183319566
698771049
317458206
333734040
599710576
310564911
609298777
730...

result:

wrong answer 2nd lines differ - expected: '468414020', found: '941869675'