using System;

​

public class Program

{

    public static void Main()

    {

        while (true)

        {

            while (true)

            {

                int Extra = 0;

                string Answer = ("Dispensing a ");

                Console.WriteLine("What number do you want?");

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

                if (Choice > 31 || Choice < 0)

                {

                    Console.WriteLine("Invalid!");

                    break;

                }

                if ((Choice & 1) != 0)

                {

                    Answer += "large ";

                }

                else

                {

                    Answer += "regular ";

                }

​

                if ((Choice & 16) != 0)

                {

                    Answer += "coffee ";

                }

                else

                {

                    Answer += "tea ";

                }

​

                if (((Choice & 8) != 0) && (Extra == 0))

                {

                    Extra = 1;

                    Answer += "with vanilla ";

                }

                else if ((Choice & 8) != 0)

                {

                    Answer += ",vanilla ";

                }

​

                if (((Choice & 4) != 0) && (Extra == 0))

                {

                    Extra = 1;

                    Answer += "with sugar ";

                }

                else if ((Choice & 4) != 0)

                {

                    Answer += ",sugar ";

                }

​

                if (((Choice & 2) != 0) && (Extra == 0))

                {

                    Extra = 1;

                    Answer += "with milk.";

                }

                else if ((Choice & 2) != 0)

                {

                    Answer += "and milk.";

                }

​

                Console.WriteLine(Answer);

            }

        }

    }

}