public static function cw_words() {
		if (self::$cw_words == NULL) {
			self::$cw_words = cw_words::instance();
		}
		return self::$cw_words;
	}
 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;
	}