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

namespace ConsoleApp8
{

    class Program
    {
        static Random gen = new Random();
        static string Generation(int N) {
            string str = "";
            for (int i = 0; i < N; i++) {
                str += (char)gen.Next('a', 'z' + 1);
            }
            return str;
        }
        static void Main(string[] args)
        {
            Console.WriteLine(Generation(10));
            Console.ReadLine();
        }
    }
}