#!/usr/bin/perl
use strict;
use warnings;

my @unsorted = ( qw (Psdf lPik Easd aKwe SSdf eqwer scfgh Oegb rqwer T) );
my %order = map {$_ => /[r-z]/ ? 'A' : /[a-q]/ ? 'B' : /[R-Z]/ ? 'C' : 'D'} ('a'..'z', 'A'..'Z');

my @sorted = map { substr($_ , 1) }
             sort
             map { $order{ substr($_,0,1) } . $_ } @unsorted;

print "$_\n" for @sorted;