using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

namespace ConsoleApplication1

{

    public class Program

    {

        static void Main(string[] args)

        {

            CustomBaseNumber cbn = new CustomBaseNumber("0123456789abcdefghjklmnpqrstuvwxyz");

            cbn.CustomBase = "";

            for (int i = ; i < ; i++)

            {

                Console.WriteLine(cbn.CustomBase.PadLeft(, ''));

                cbn.DecBase++;

            }

            Console.ReadKey();

        }

    }

    class CustomBaseNumber

    {

        private string _chars;

        public CustomBaseNumber(string chars)

        {

            _chars = chars;

        }

        public string CustomBase

        {

            get

            {

                string value = "";

                int decvalue = DecBase;

                int n = ;

                if (decvalue == ) return new string(new char[] { _chars[] });

                while (decvalue > )

                {

                    n = decvalue % _chars.Length;

                    value = _chars[n] + value;

                    decvalue = decvalue / _chars.Length;

                }

                return value;

            }

            set

            {

                int n = ;

                Func<char, int> getnum = (x) => { for (int i = ; i < _chars.Length; i++) if (x == _chars[i]) return i; return ; };

                for (int i = ; i < value.Length; i++)

                {

                    n += Convert.ToInt32(Math.Pow((double)_chars.Length, (double)(value.Length - i - )) * getnum(value[i]));

                }

                DecBase = n;

            }

        }

        public int DecBase

        {

            get;

            set;

        }

    }

}