//11/28/12
	public static String unusedAlphabetCharacters(String x){
		String temp = "";
		String alphabet = makeString(97, 122);
		String lcaseX = x.toLowerCase();
		for(int i = 0; i < 26; i++){
			String ltr = alphabet.substring(i,i+1);
			char ch = ltr.charAt(0);
			if(lcaseX.indexOf(ch)<0) temp+= ch;
		}
		return temp;
	}