Or full on alias

Code:

alias filtering {
  if ($isid) {
    if ($prop = c) {
      var %string $1-, %e 256
      while (%e) {
        if (($chr(%e) isalpha) || ($chr(%e) isnum)) { %string = $remove(%string, $chr(%e)) }
        dec %e
      }
      return $iif(%string, Results for Characters: %string , No results for Characters.)
    }
    if ($prop = l) { 
      var %string $1-, %e 256
      while (%e) {
        if ($chr(%e) !isalpha) { %string = $remove(%string, $chr(%e)) }
        dec %e
      }
      return $iif(%string, Results for Letters: %string , No results for Letters.)
    }
    if ($prop = n || !$prop) {
      var %string $1-, %e 256
      while (%e) {
        if ($chr(%e) !isnum) { %string = $remove(%string, $chr(%e)) }
        dec %e
      }
      return $iif(%string, Results for Numbers: %string , No results for Numbers.)
    }
  }
}