#!/usr/bin/perl -w

use strict;

my @h = ( qw(
                psapp1
                psapp
                psapp2
                psepapp1
                psepapp
                psepapp2
                psimgprod
                pspappuat
                pswebapp2
                pswebapp
              ) );

my @h_sorted = @h[
        map { unpack "N", substr($_,-4) }
        sort
        map {
            my $key = $h[$_];
            $key =~ s[(\d+)][ pack "N", $1 ]ge;
            $key . pack "N", $_
        } 0..$#h
];
    

foreach (@h_sorted) { print "$_\n"; };