function reduceletters($letters) {
		$return = $letters;
    if (!empty($letters) && strlen($letters) > 1) {
      foreach (str_split($letters) as $letter) {
        $bypoints[$letter] = cw_words::getPoints($letter);
      }
      arsort($bypoints);
      end($bypoints);
      $key = key($bypoints);
      unset($bypoints[$key]);
      $return = implode('', array_keys($bypoints));
    }
		return $return;
  }
 public function setUp() {
   $this->cw_words = cw_words::instance();
 }
	public static function instance() {
		if (self::$instance == NULL) {
			self::$instance = new cw_words();
		}
		return self::$instance;
	}