static void Main(string[] args)
        {
            for(int y = 0; y < 10; y++)
            {
                string message = "";
                for(int x = 0; x < 10; x++)
                {

                    int rightX = 9 - x;
                    int rightY = 9 - y;

                    if(rightX > x)
                    {
                        rightX = x;
                    }

                    if(rightY > y)
                    {
                        rightY = y;
                    }

                    if(rightX > rightY)
                    {
                        message += rightY;
                    }
                    else
                    {
                        message += rightX;
                    }
                }
                Console.WriteLine(message);
            }
        }