using System;

public class Program

{

    public static void Main()

    {

        Random randomGenerator = new Random();

        Console.WriteLine("Do you want to flip a coin");

        string wantToFlipCoin = Console.ReadLine();

        while (wantToFlipCoin == "yes")

        {

            var coinFlip = randomGenerator.Next(1, 3);

            if (coinFlip == 1)

            {

                Console.WriteLine("Heads");

            }

            else

            {

                Console.WriteLine("Tails");

            }

            Console.WriteLine("Do you want to flip another coin?");

                wantToFlipCoin = Console.ReadLine();

        }

    }

}