using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace yukiCoder {
    class Program {
        static void Main(string[] args) {
            shiritori(int.Parse(Console.ReadLine()));
            Console.ReadKey();
        }
        public static void shiritori(int line) {
            string word = null;
            string lastword = null;
            var rndList = new List<byte>();
            var rnd = new Random(Environment.TickCount);
            for (int i = 1; i <= line; i++) {
                do {
                    for (int j = 0; j < rnd.Next(2, 19); j++) {
                        rndList.Add(byte.Parse(rnd.Next(65, 91).ToString()));
                    }
                    word = Encoding.ASCII.GetString(rndList.ToArray()).ToLower();
                    if (word.Last() == 'n') {
                        word = word.Substring(0, word.Length - 1) + 'p';
                    }
                } while (lastword == word);
                if (lastword != null) {
                    char c = lastword.Last();
                    word = word.Substring(1, word.Length - 1);
                    word = c + word;
                }
                if (i == line) {
                    word += 'n';
                }
                Console.WriteLine(word);
                lastword = word;
                rndList.Clear();
            }
        }
    }
}