using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace EntreCS

{

    public class Program

    {

        public static void Main(string[] args)

        {

            List<int> notMatching = new List<int>();

            for (int i = 9; i >= 0; i--)

            {

                for (int j = 0; j <= 9; j++)

                {

                    if (i + j == 10)

                    {

                        Console.WriteLine("Match found for " + i.ToString() + j.ToString() + ": (" + i.ToString() + "," + j.ToString() + ")");

                    }

                    else notMatching.Add(Convert.ToInt32(i.ToString() + j.ToString()));

                }

            }

            Console.WriteLine("");

            if (notMatching.Count > 0)

            {

                var orderNotMatching = notMatching.OrderByDescending(o => o);

                Console.WriteLine("No match found for:");

                string displayString = null;

                foreach (var element in orderNotMatching)

                {

                    displayString += "," + element;

                }

                Console.WriteLine(displayString.Substring(1));

            }

        }

    }

}