function conv_rights($rights) {
  $charray = preg_split('//', $rights, -1, PREG_SPLIT_NO_EMPTY);
  $value = 777;
  $count = 0;
  $table = array(400,200,100,40,20,10,4,2,1);
  foreach($charray as $char) {
    if ($char == "-") $value -= $table[$count];
    $count++;
  }
  return $value;
}