import java.util.Random;
import java.util.Scanner;

public class Main
{
    public static void main( String[] args )
    {
        Scanner keyboard = new Scanner(System.in);
        Random rng = new Random();

        String again = "y";

        do {
            int flip = rng.nextInt(2);
            String coin;

            if (flip == 1)
                coin = "HEADS";
            else
                coin = "TAILS";

            System.out.println("You flip a coin and it is... " + coin);

            System.out.print("Would you like to flip again (y/n)? ");
            again = keyboard.next();

        } while (again.equals("y"));
    }
}