#! /usr/bin/perl is useless in windows ( and wrong path here )

Your code don't need that complex. Follow code works as well

use warnings;
use strict;
use utf8;
use feature "say";

binmode STDOUT, ":utf8";
my $unicodeStr = "..."; # assign your own Unicode char as I can't type
+ Unicode in here
say for sort ($uniCodeStr, "user login" ) ;
[download]

One problem is that, when you run the script inside a CMD console, it's default code page is ANSI, but whatever codepage you set (chcp) , you will not able to print a proper result ( from my experience ).

To print a proper result, you might want to use tools like PowerShell or NppExec(a plugin) with Notepad++ ( you also have to set the output encoding for this plugin )