I have a serial of strings that each one of them is different from each another.But each one has a length of 49 characters.
I want to shorten them to about 10-20 characters.And each one of them after shortened should be different from each another too.
But I don't know how to do it.Can anyone help me with it?
Thanks a lot.

or

Maybe what I really want is to automatically generate a serial of strings with about 10-20 characters that each one of them is different from each another.But I can do that either.I got them with 49 characters.