protected function generateWord()
	{
		$wordFile=dirname(__FILE__).'/words.txt';
		$words=preg_split("/[\s,]+/",file_get_contents($wordFile));
		do
		{
			$i=rand(0,count($words)-1);
			$word=$words[$i];
		} while(strlen($word)<5 || !ctype_alpha($word));
		return strtoupper($word);
	}