[5]
[0]
[1]
[4,4]
[4,0]
[2,4]
[1,2,3]
[1,2,0]
[3,2,3]
[7,7,7,7]
[7,7,7,0]
[4,7,7,7]
[1,2,3,4,5]
[1,2,3,4,0]
[5,2,3,4,5]