[0, 0, 0, 0, 1]
[0, 2, 0, 0, 1]
[0, 2, 0, 3, 1]
[0, 2, 4, 3, 1]
[2, 5, 4, 3, 1]
[2, 5, 4, 3, 1]
2 5 4 3 1