Then if I try to use the binary, then it is ok, but you know that the binary sort according to ascii code of the character, then the following problem:
Asad
asad
Asad
asad
Bob
Tom
the output:
Asad
Asad
Bob
Tom
asad
asad
The sort must be like this:
Asad
Asad
asad
asad
Bob
Tom