Console.WriteLine("Input first number");
            string userInput1 = Console.ReadLine();
            int firstNumber = int.Parse(userInput1);
            Console.WriteLine("Input second number");
            string userInput2 = Console.ReadLine();
            int secondNumber = int.Parse(userInput2);

            if (firstNumber > secondNumber)
            {
                Console.WriteLine(userInput1 + " is bigger than " + userInput2);
            }
            if (secondNumber > firstNumber)
            {
                Console.WriteLine(userInput2 + " is bigger than " + userInput1);
            }
            else
            {
                Console.WriteLine("Goodbye.");
            }


            Console.ReadLine();