10 21 32 43 54 65 76 87 98 109 11A 12B 13C 14D 15E 16F 17G 18H 19I 20J 21K 22L 23M 24N 25O 26P 27Q 28R 29S 30T 31U 32V 33W 34X 35Y 36Z 37AA 38ZZ 39ibase=B 40AA 41AB 42ZZ 43ibase=G 44AA 45AB 46B0 47Y0 48Y1 49YY 50YZ 51ZE 52ZF 53ZG 54