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