public static boolean validChoice(int row, int column) {
		boolean valid = true;
		if (row < 0 || row > 2 || column < 0 || column > 2) {
			valid = false;
		} else if (board[row][column] == 'X' || board[row][column] == 'O') {
			valid = false;
		}

		return valid;
	}