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


namespace _16_NumbersTo100Words_NotCompleted_
    {
        class Program
        {
            static void Main(string[] args)
            {
                var inputNumber = int.Parse(Console.ReadLine());



                var lastNum = inputNumber % 10;
                var firstNum = inputNumber / 10;

                if (inputNumber < 0 || inputNumber >100)
                {
                    Console.WriteLine("invalid number"); // GOTCHA JUDGE
                    return;
                }

                if (inputNumber == 100)
                {
                    Console.WriteLine("one hundred");
                }
                if (inputNumber == 0)
                {
                    Console.WriteLine("zero");
                }
                if (inputNumber == 10)
                {
                    Console.WriteLine("ten");
                }
                if (inputNumber == 11)
                {
                    Console.WriteLine("eleven");
                    return;
                }
                if (inputNumber == 12)
                {
                    Console.WriteLine("twelve");
                    return;
                }
                if (inputNumber == 13)
                {
                    Console.WriteLine("thirteen");
                    return;
                }
                if (inputNumber == 14)
                {
                    Console.WriteLine("fourteen");
                    return;
                }
                if (inputNumber == 15)
                {
                    Console.WriteLine("fifteen");
                    return;
                }
                if (inputNumber == 16)
                {
                    Console.WriteLine("sixteen");
                    return;
                }
                if (inputNumber == 17)
                {
                    Console.WriteLine("seventeen");
                    return;
                }
                if (inputNumber == 18)
                {
                    Console.WriteLine("eighteen");
                    return;
                }
                if (inputNumber == 19)
                {
                    Console.WriteLine("nineteen");
                    return;
                }
                if (inputNumber == 20)
                {
                    Console.WriteLine("twenty");
                    return;
                }
                if (inputNumber == 30)
                {
                    Console.WriteLine("thirty");
                    return;
                }
                if (inputNumber == 40)
                {
                    Console.WriteLine("fourty");
                    return;
                }
                if (inputNumber == 50)
                {
                    Console.WriteLine("fifty");
                    return;
                }
                if (inputNumber == 60)
                {
                    Console.WriteLine("sixty");
                    return;
                }
                if (inputNumber == 70)
                {
                    Console.WriteLine("seventy");
                    return;
                }
                if (inputNumber == 80)
                {
                    Console.WriteLine("eigty");
                    return;
                }
                if (inputNumber == 90)
                {
                    Console.WriteLine("ninety");
                    return;
                }

                // tuk proverqvame koe e purvoto 4islo i go izpisvame

                if (firstNum == 2)
                {
                    var resultOne = "twenty";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 3)
                {
                    var resultOne = "thirty";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 4)
                {
                    var resultOne = "fourty";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 5)
                {
                    var resultOne = "fifty";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 6)
                {
                    var resultOne = "sixty";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 7)
                {
                    var resultOne = "seventy";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 8)
                {
                    var resultOne = "eighty";
                    Console.Write(resultOne + " ");
                }
                if (firstNum == 9)
                {
                    var resultOne = "ninety";
                    Console.Write(resultOne + " ");
                }

                // proverqvame koe e poslednoto i go izpisvame
                if (lastNum == 1)
                {
                    var resultTwo = "one";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 2)
                {
                    var resultTwo = "two";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 3)
                {
                    var resultTwo = "three";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 4)
                {
                    var resultTwo = "four";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 5)
                {
                    var resultTwo = "five";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 6)
                {
                    var resultTwo = "six";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 7)
                {
                    var resultTwo = "seven";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 8)
                {
                    var resultTwo = "eight";
                    Console.WriteLine(resultTwo);
                }
                if (lastNum == 9)
                {
                    var resultTwo = "nine";
                    Console.WriteLine(resultTwo);
                }
            }
        }
    }