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