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

namespace testingTesting
{
    class testingTesting
    {
        static void Main(string[] args)
        {
            int x = int.Parse(Console.ReadLine());
            int y = 0;

            string[] toNineteen = { "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
            "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};

            string[] toNinety = { "twenty", "thirty", "fourty", "fifty", "sixty", "seventy", "eighty", "ninety" };

            if (x == 0)
            {
                Console.WriteLine("zero");
            }

            else if (x == 100)
            {
                Console.WriteLine("one hundred");
            }

            else if (x > 100)
            {
                Console.WriteLine("invalid number");
            }

            else
            {
                while (y != x)
                {
                    y++;
                }

                if (y <= 19)
                {
                    Console.WriteLine(toNineteen[y - 1]);
                }

                else if (y <= 29)
                {
                    if (y == 20)
                    {
                        Console.WriteLine(toNinety[0]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[0] + " " + toNineteen[y - 21]);
                    }
                }

                else if (y <= 39)
                {
                    if (y == 30)
                    {
                        Console.WriteLine(toNinety[1]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[1] + " " + toNineteen[y - 31]);
                    }
                }

                else if (y <= 49)
                {
                    if (y == 40)
                    {
                        Console.WriteLine(toNinety[2]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[2] + " " + toNineteen[y - 41]);
                    }
                }

                else if (y <= 59)
                {
                    if (y == 50)
                    {
                        Console.WriteLine(toNinety[3]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[3] + " " + toNineteen[y - 51]);
                    }

                }

                else if (y <= 69)
                {
                    if (y == 60)
                    {
                        Console.WriteLine(toNinety[4]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[4] + " " + toNineteen[y - 61]);
                    }

                }

                else if (y <= 79)
                {
                    if (y == 70)
                    {
                        Console.WriteLine(toNinety[5]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[5] + " " + toNineteen[y - 71]);
                    }
                }

                else if (y <= 89)
                {
                    if (y == 80)
                    {
                        Console.WriteLine(toNinety[6]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[6] + " " + toNineteen[y - 81]);
                    }

                }

                else if (y <= 99)
                {
                    if (y == 90)
                    {
                        Console.WriteLine(toNinety[7]);
                    }
                    else
                    {
                        Console.WriteLine(toNinety[7] + " " + toNineteen[y - 91]);
                    }
                }
            }
        }
    }
}