using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        int D = 10;

        List<string> allNumbers =new List<string>();

        string[] lastCombinedDigits =new  string[D];

        string[] lastNumberDigits = new string[D];

        for(int o =-0; o < 10; o++){

            lastCombinedDigits[o] = "0";

        }

        for(int n =1; n <= 9; n++){

            lastNumberDigits = new string[n];

            lastCombinedDigits[lastCombinedDigits.Length -1] = n.ToString();

            allNumbers.Add(string.Concat(lastCombinedDigits));

            for(int d = lastCombinedDigits.Length -2; d>= 0; d--){

                lastCombinedDigits[d] = n.ToString();

                allNumbers.Add(string.Join("",lastCombinedDigits));

            }

            allNumbers.Add("\n");

            //lastCombinedDigits[lastCombinedDigits.Length -1] = n.ToString();

            for(int p = 1; p < n; p++){

                for(int dn = lastCombinedDigits.Length-2;dn >=0 ; dn--){

                    lastCombinedDigits[dn] = p.ToString();

                }

            }

        }

        for(int ln = 0; ln < allNumbers.Count();ln++){

            Console.WriteLine(allNumbers[ln]);

        }

    }

}