using System;

public class Program

{

    public static void Main()

    {

        for (int first = 0; first < 10; first++)

        {

            for (int second = 0; second < 10; second++)

            {

                for (int third = 0; third <10; third++)

                {

                    int fourth = (first + second) - third;

                    if ((fourth >= 0) && (fourth <=9))

                    {

                    Console.WriteLine ("" + first + second + third + fourth);

                    }

                }

            }

        }

    }

}