---

<?php

  $hash  = md5("proton.me");
  $array = str_split($hash);
  $text = '&!@%?&@%';
  
      
  for ($item = 0; $item<32; $item++) {
    if (preg_match("/-" . $item . "-/i", "-1-5-9-13-17-21-25-29-")) {
      $array[$item] = strtoupper($array[$item]);
    } else if (preg_match("/-" . $item . "-/i", "-3-7-11-15-19-23-27-31-")) {
      $array[$item] = substr($text, 0, 1);
      $text = substr($text, 1);
    } else {
      continue;
    }
  }

  $result = join("", $array);
  echo $result;