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