0 x 9 + 1 = 1
01 x 9 + 2 = 11
012 x 9 + 3 = 111
0123 x 9 + 4 = 1111
01234 x 9 + 5 = 11111
012345 x 9 + 6 = 111111
0123456 x 9 + 7 = 1111111
01234567 x 9 + 8 = 11111111
012345678 x 9 + 9 = 111111111
0123456789 x 9 +10= 1111111111
