public void MyMain()
        {
            // 1
            Die d = new Die();
            Console.WriteLine(d.GetValue());

            d.RollDie();
            Console.WriteLine(d.GetValue());

            // 2a
            DiceCupSolution cup = new DiceCupSolution();
            cup.RollDice();

            // 2b
            Console.WriteLine(cup.GetTotalValue());

            // 2c
            Console.WriteLine(cup.IsTotalValueLargerThan(5));
        }