#!/usr/bin/perl

while (<>)
{
  $h{$_}=1;
}

foreach $key (sort shuffle keys %h)
{
  print $key;
}

sub shuffle {
  $ran = rand(1);

  if ($ran > 0.5)
  {
    return -1;
  }
  else
  {
    return 1;
  }
}