using System;

public class Program

{

    public static void Main()

    {

        // input 

          Console.WriteLine("enter your text.");

            string input = Console.ReadLine();

            Console.WriteLine("enter your shift distance");

            int distanceshift = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("enter \n'C'for coding \n'D'for debug");

            char thechoice = Convert.ToChar(Console.ReadLine().ToUpper());

            if (thechoice == 'C')

            {

                codingmethod(input, distanceshift);

                //output 1

            }

            if (thechoice == 'D')

            {

                debugmethod(input, distanceshift);

                //output 2

            }

​

           Console.ReadKey();

        }

        static void codingmethod(string input,int distanceshift)

        {

            for (int i = 0; i < input.Length; i++)

            {

                //convert letter char to   int +shift distance

                int letter = (int)input[i] + distanceshift;

                if (letter > 122)

                {

                    //if the letter is more than z

                    letter = 96 + (letter - 122);

                }

                if (letter == 32 + distanceshift)

                {

                    //space num

                    letter = 32;

                }

                //convert letter int to char

               Console.Write((char)letter);

            }

        }

        static void debugmethod(string input, int distanceshift)

        {

            for (int i = 0; i < input.Length; i++)

            {

                //convert letter char to   int -shift distance

                int letter = (int)input[i] - distanceshift;

                if (letter < 97)

                {

                    //if the letter is less than than a

                    letter = 123 - (97 - letter);

                }

                if (letter == 32 + distanceshift)

                {

                    //space num 

                    letter = 32;

                }

                 //convert int to char

                Console.Write((char)letter);

            }

        }

}

​

​

​

​

​

}