|Each character is one of the following 24 letters and digits:|
B C D F G H J K M P Q R T V W X Y 2 3 4 6 7 8 9
Certain characters are difficult to read.
The number 8 and the letter B, as well as the number 6 and the letter G.
These characters are NOT in the Product Key:
A, E, I (capital i), L, N, O (capital o), S, U (capital u), Z (capital z), 0 (zero), 1 (one), 5 (five).