So if we were to take characters for AEIOU and then combine them in pairs, to get different characters. We could get 5^2=25 characters total. If we combine 3 stamps then we get 5^3=125 characters total, which is an overkill for any alphabet.
So if we were to take characters for AEIOU and then combine them in pairs, to get different characters. We could get 5^2=25 characters total. If we combine 3 stamps then we get 5^3=125 characters total, which is an overkill for any alphabet.