input:

4
2
1 2
2 1
5
2 4 1 5 3
2 4 1 5 3
5
1 2 3 4 5
5 4 3 2 1
8
5 8 3 4 2 7 1 6
4 6 3 8 5 1 2 7

output:

result:

wrong answer Answer contains longer sequence [length = 20], but output contains 0 elements