0,0,0,0,0,0,0,0
9,1,2,3,4,5,6,7
1,2,3,4,5,6,7,8
1,2,3,5,5,6,7,8
1,2,3,4,5,7,7,8
2,3,4,5,6,7,8,9
11,22,33,44,55,66,77,88,99