[2, 2]
1
[3, 2, 1]
4
[4, 2, 1, 4]
3
[5, 2, 1, 4, 3]
6
[2, 1, 3]
4
[3, 4, 3, 4]
1
[4, 3, 3, 4, 1]
2
[5, 6, 3, 4, 1, 2]
7
[2, 1, 4, 4]
3
[3, 4, 1, 4, 3]
2
[4, 3, 2, 4, 3, 2]
1
[5, 6, 7, 4, 3, 2, 1]
8
[2, 1, 4, 3, 5]
6
[3, 4, 1, 2, 5, 6]
7
[4, 3, 2, 1, 5, 6, 7]
8
[5, 6, 7, 8, 5, 6, 7, 8]
1
1 2 3 4 5
2 1 4 3 6
3 4 1 2 7
4 3 2 1 8
5 6 7 8 1