    public static void printCharRange(char a, char b) {
        char first, last;
        if (a <= b) {
            first = a;
            last  = b;
        } else {
            first = b;
            last  = a;
        }

        for (char ch = first; ch <= last; ch++)
            System.out.print(ch);

	System.out.println();
    }
