using System;
using System.IO;
using System.Collections.Generic;

namespace No701
{
    public class Program
    {
        const int Length = 20;
        readonly Random rand = new Random();
        readonly HashSet<string> hs = new HashSet<string>();

        void Solve(StreamScanner ss, StreamWriter sw)
        {
            //---------------------------------
            var N = ss.Next(int.Parse);
            for (var i = 0; i < N - 1; i++) sw.WriteLine($"a{GetRandomWord()}a");
            sw.WriteLine("azerbaijan");
            //---------------------------------
        }

        string GetRandomWord()
        {
            var ret = "";
            for (var i = 0; i < Length - 2; i++) ret += (char)('a' + rand.Next(26));
            if (hs.Contains(ret)) return GetRandomWord();
            hs.Add(ret);
            return ret;
        }

        static void Main()
        {
            var ss = new StreamScanner(new StreamReader(Console.OpenStandardInput()));
            var sw = new StreamWriter(Console.OpenStandardOutput()) {AutoFlush = false};
            new Program().Solve(ss, sw);
            sw.Flush();
        }
    }

    public class StreamScanner
    {
        static readonly char[] Sep = {' '};
        readonly Queue<string> buffer = new Queue<string>();
        readonly TextReader textReader;

        public StreamScanner(TextReader textReader)
        {
            this.textReader = textReader;
        }

        public T Next<T>(Func<string, T> parser)
        {
            if (buffer.Count != 0) return parser(buffer.Dequeue());
            var nextStrings = textReader.ReadLine().Split(Sep, StringSplitOptions.RemoveEmptyEntries);
            foreach (var nextString in nextStrings) buffer.Enqueue(nextString);
            return Next(parser);
        }
    }
}