using System;

public class Program

{

    public static void Main()

    {

        int num;

        char ch='A';

        Console.WriteLine("Enter the number of digits to be printed:");

        num=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("The order is:");

        for(int i=0;i<num;i++)

        {

            ch=Convert.ToChar(ch+(2^i));

            Console.WriteLine(ch+"\t");

        }

    }

}