You are completely right. I don't know how I missed the needed sort call. It's even more stupid considering that a 4 character hash has only 16*4 => 65536 diff

You are completely right. I don't know how I missed the needed sort call. It's even more stupid considering that a 4 character hash has only 16*4 => 65536 different strings so there must be a lot of collisions in over a million different hashes.