What determine character placement

I have a small question. If i made a character, what is the reason it goes into a certain folder in userdata.

Is there a small formula or something?

i know it has something to do with the letters of the name in hex or something

for examples

abcde

asc num of a + b + c + d + e divide that by 256 and take the remainder

All characters will be convert to UPER Case before change to ascii . Mean you type a it will be 65( ascii of A )

opps left out that , thx for raising that issue