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

namespace num2string_100_SC_SoftUni_home
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            string[] a = new string[] { "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine","Ten" };
            string[] b = new string[] { "ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen" };
            string[] c = new string[] {"","","twenty","thirty","fourty","fifty","sixty","seventy","eighty","ninety"};
            string[] d = new string[] { "","one","two","three","four","five","six","seven","eight","nine" };
            string h = "hundred";

            if (n<=10)
            {
                string outun = a[n-1];
                Console.WriteLine(outun);
            }

            else if (n > 10 && n > 20 && n < 100)
            {
                int units = n % 10;
                int digits = n /= 10;
                string outputd = c[digits];
                string outputun = d[units];
                Console.WriteLine("{0} {1}", outputd, outputun);
            }

            else if (n > 10 && n < 20)
            {
                int units1 = n % 10;
                string oout = b[units1];
                Console.WriteLine(oout);
            }

            else if (n % 10 == 0 && n < 100)
            {
                int desetici = (n / 10);
                string desetki = c[desetici];
                Console.WriteLine(desetki);
            }

            else if (n / 100 == 1)
            {
                if (n < 101) {
                int stotici = n / 100;
                string sto = a[stotici - 1];
                Console.WriteLine("{0} {1}", sto, h);
                }
            }

             if (n>100)
                Console.WriteLine("invalid number");

        }

    }
}