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

namespace Conditional_Statetment
{
    class Program
    {
        static void Main(string[] args)
        {
            var num = int.Parse(Console.ReadLine());
            var result = "";

            if(num<0||num>100)
            {
                result += "Invalid number";

            }
            else if(num == 100)
            {
                result += "one hundred";
            }
            if (num ==0)
            {
                result +="zero";
            }
            else if(num==1)
            {
                result += "one";
            }
            else if (num == 2)
            {
                result += "two";
            }
            else if (num == 3)
            {
                result += "three";
            }
            else if (num == 4)
            {
                result += "four";
            }
            else if (num == 5)
            {
                result += "five";
            }
            else if (num == 6)
            {
                result += "six";
            }
            else if (num == 7)
            {
                result += "seven";
            }
            else if (num == 8)
            {
                result += "eight";
            }
            else if (num == 9)
            {
                result += "nine";
            }
            else if (num == 10)
            {
                result += "ten";
            }
            else if (num == 11)
            {
                result += "eleven";
            }
            else if (num == 12)
            {
                result += "twelve";
            }
            else if (num == 13)
            {
                result += "thirteen";
            }
            else if (num == 14)
            {
                result += "fourteen";
            }
            else if (num == 15)
            {
                result += "fifteen";
            }
            else if (num == 16)
            {
                result += "sixteen";
            }
            else if (num == 17)
            {
                result += "seventeen";
            }
            else if (num == 18)
            {
                result += "eighteen";
            }
            else if (num == 19)
            {
                result += "nineteen";
            }
            if(num >=20 && num < 30)
            {
                result += "twenty";
                if(num%10==1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }
            }
            if (num >= 30 && num < 40)
            {
                result += "thirty";
                if (num % 10 == 1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }


            }
            if (num >= 40 && num < 50)
            {
                result += "fourty";
                if (num % 10 == 1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }
            }
            if (num >= 50 && num < 60)
            {
                result += "fifty";
                if (num % 10 == 1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }


            }
            if (num >= 60 && num < 70)
            {
                result += "sixty";
                if (num % 10 == 1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }


            }
            if (num >= 70 && num < 80)
            {
                result += "seventy";
                if (num % 10 == 1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }


            }
            if (num >= 80 && num < 90)
            {
                result += "eighty";
                if (num % 10 == 1)
                {
                    result += " one";
                }
                if (num % 10 == 2)
                {
                    result += " two";
                }
                if (num % 10 == 3)
                {
                    result += " three";
                }
                if (num % 10 == 4)
                {
                    result += " four";
                }
                if (num % 10 == 5)
                {
                    result += " five";
                }
                if (num % 10 == 6)
                {
                    result += " six";
                }
                if (num % 10 == 7)
                {
                    result += " seven";
                }
                if (num % 10 == 8)
                {
                    result += " eight";
                }
                if (num % 10 == 9)
                {
                    result += " nine";
                }


            }
            if (num >= 90 && num <= 99)
            {
                result += "ninety"; //ninety-nine //ninety nine"
                if (num % 10 == 1)
                {
                    result += " one";
                }
                else if (num % 10 == 2)
                {
                    result += " two";
                }
                else if (num % 10 == 3)
                {
                    result += " three";
                }
                else if(num % 10 == 4)
                {
                    result += " four";
                }
                else if(num % 10 == 5)
                {
                    result += " five";
                }
                else if(num % 10 == 6)
                {
                    result += " six";
                }
                else if(num % 10 == 7)
                {
                    result += " seven";
                }
                else if (num % 10 == 8)
                {
                    result += " eight";
                }
                else if (num % 10 == 9)
                {
                    result += " nine";
                }
            }
            Console.WriteLine(result);
        }
    }
}