15
[2, 3, 2]
[3, 2, 3]
[1, 2, 4, 6, 1]
[2, 4, 6, 1, 2]
[4, 6, 1, 2, 3]
[4, 6, 1, 2, 4]
[6, 1, 2, 4, 6]
[1, 2, 4, 5, 6, 1]
[2, 4, 5, 6, 1, 2]
[3, 2, 4, 6, 1, 7]
[4, 5, 6, 1, 2, 3]
[4, 5, 6, 1, 2, 4]
[5, 6, 1, 2, 4, 5]
[6, 1, 2, 4, 5, 6]
[3, 2, 4, 5, 6, 1, 7]