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

namespace NumToWords
{
    class Program
    {
        static void NumToWord(int a)
        {
            string[] ZeroToNineteen = {"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
                "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
            string[] Tens = { "twenty", "thirty", "fourty", "fifty", "sixty", "seventy", "eighty", "ninety", "one hundred"};

            int toTens = a / 10 - 2;
            int nineteen = a % 10;

            if (a >= 0 && a <= 100)
            {
                if (a < 20)
                {
                    Console.WriteLine(ZeroToNineteen[a]);
                }
                else if (a >= 20 && a % 10 == 0)
                {
                    Console.WriteLine(Tens[toTens]);
                }
                else
                {
                    Console.WriteLine(Tens[toTens] + " " + ZeroToNineteen[nineteen]);
                }
            }
            else
            {
                Console.WriteLine("invalid number");
            }
        }
        static void Main(string[] args)
        {

                var input = int.Parse(Console.ReadLine());
                NumToWord(input);




        }
    }
}