using System;

public class Program

{

    public static void Main()

    {

        string name;

        int number1;

        int number2;

        int sum;

        int product;

        int difference;

        Console.WriteLine("Please input your first name! ");

        name = Console.ReadLine();

        Console.WriteLine();

        Console.WriteLine(name + " please input a 1st number from 0 to 9 ");

        number1 = int.Parse(Console.ReadLine());

        Console.WriteLine();

        Console.WriteLine(name + " please input a 2nd number from 0 to 9 ");

        number2 = int.Parse(Console.ReadLine());

        Console.WriteLine();

        if ((number1 < 0)||(number1 > 9))

        {number1 = 5; }

        if ((number2 < 0)||(number2 > 9))

        {number2 = 5; }

        sum = number1 + number2;

        product = number1 * number2;

        difference = number1 - number2;

        Console.WriteLine("First-) The sum of " + number1 + " + " + number2 + " = " + sum);

        Console.WriteLine();

        Console.WriteLine("Second-) The product of " + number1 + " x " + number2 + " = " + product);

        Console.WriteLine();

        Console.WriteLine("Third-) The diffrence of " + number1 + " - " + number2 + " = " + difference);

        Console.WriteLine();                  

        Console.WriteLine(name + " thank you for using my code :):):) ");                 

    }

}