using System;
using System.Globalization;
using System.Linq;
using System.Collections.Generic;


namespace Nikola_practice
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int l = int.Parse(Console.ReadLine());

            for (int i = 1; i <= n; i++)
            {
                for (int s = 1; s <= n; s++)
                {
                    for (char d = 'a'; d < 'a'+l; d++)
                    {
                        for (char r = 'a'; r < 'a'+l; r++)
                        {
                            for (int h =1; h <= n; h++)
                            {
                                if (h>s && h>i)
                                {
                                    Console.Write("{0}{1}{2}{3}{4} ",i , s , d , r , h);
                                }
                            }
                        }
                    }
                }
            }
            Console.WriteLine();
        }
    }
}