private static void printHeader() {
		String headerString = "  |";
		for (int i = 0; i < length; i++) {
			int valOfA = (int) 'A';
			char letterToOutput = (char) (i + valOfA);
			headerString += String.format("     %c    |", letterToOutput);
		}
		System.out.println(headerString);
	}