1 + 8 = 91 + 8 = 9
2 + 8 = 102 + 8 = 10
3 + 8 = 113 + 8 = 11
4 + 8 = 124 + 8 = 12
5 + 8 = 135 + 8 = 13
6 + 8 = 146 + 8 = 14
7 + 8 = 157 + 8 = 15
8 + 8 = 168 + 8 = 16
9 + 8 = 179 + 8 = 17
10 + 8 = 1810 + 8 = 18