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
839203589
550143557
918384806
395987239
487662742
776412276
869581749
788558042
392827641
315802614
887328316
417447641
654037969
311550833
899652320
859599306
271631118
908525604
945867336
433351719
56023919
576147205
183319566
698771049
2969985
831623816
599710576
310564911
578242286
232...

result:

wrong answer 2nd lines differ - expected: '468414020', found: '839203589'