public static char nextLetter(char letter) {
		if (letter == 'Z') {
			return 'A';
		}
		else if (letter == 'z') {
			return 'a';
		}
		
		for (int i = 0; i < 51; i++) {
			if (getAlphabet(true).charAt(i) == letter) {
				return getAlphabet(true).charAt(i + 1);
			}
		}
		
		//keeps compiler happy
		return ' ';
	}