They could normalize it in the following way before storing a hash: 1. If the last letter in the string is uppercase, flip the case of the entire string. 2. M

They could normalize it in the following way before storing a hash: 1. If the last letter in the string is uppercase, flip the case of the entire string. 2. Make the first character lowercase. This would allow for abC as well (if you "capitalized" the first letter while holding down capslock).