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

namespace ConsoleApp5
{
    class Program
    {
        static Random rnd = new Random();

        static public char MostFindedChar(string str)
        {
            int[] arr = new int['z'-'a'+1];

            for (int i = 0; i < str.Length; i++)
            {
                arr['a' - str[i]]++;
            }

            int maxIndex = 0;

            for (int i = 0; i < arr.Length; i++)
            {
                if (arr[i] > arr[maxIndex])
                    maxIndex = i;
            }

            return (char)(arr[maxIndex] + 'a');
        }

        static public char[] ArrayGen()
        {
            List<char> list = new List<char>();
            int k;
            do
            {
                Console.WriteLine("Введите к: ");
            } while (!int.TryParse(Console.ReadLine(), out k));

            File.AppendAllText("../../log.txt", $"k = {k}\n");

            for (int i = 'a'; i <= 'z'; i++)
            {
                if(i % k == 0)
                    list.Add((char)i);
            }

            return list.ToArray();
        }

        static public int FindCharsCount(string str, char ch1, char ch2)
        {
            int count = 0;

            for (int i = 0; i < str.Length; i++)
            {
                if (str[i] >= ch1 && str[i] <= ch2)
                    count++;
            }

            return count;
        }

        static public void CharsCount(string str)
        {
            int[] arr = new int['z' - 'a' + 1];

            for (int i = 0; i < str.Length; i++)
            {
                arr['a' - str[i]]++;
            }

            for (int i = 0; i < arr.Length; i++)
            {
                if(arr[i] == 0)
                    continue;

                Console.Write(i + 'a' + ": " + arr[i]);
            }
        }

        static void Main(string[] args)
        {
            int n;
            try
            {
                n = int.Parse(Console.ReadLine());

                if(n < 1)
                    throw new ArgumentException("Длина была меньше 1.");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                return;
            }

            string str = "";
            for (int i = 0; i < n; i++)
            {
                str += (char)rnd.Next('a', 'z' + 1);
            }

            char[] arr = str.ToCharArray();

        }
    }
}