using System;

namespace Number0To100InText
{
    class Program
    {
        static void Main(string[] args)
        {
            //input int number
            //number < 10
            //number >= 10 <= 99
            //number 100
            //output

            int number = int.Parse(Console.ReadLine());
            int leftSide = number / 10;
            int rightSide = number % 10;

            string leftSideTransform = "";
            string rightSideTransform = "";

            if (leftSide == 2)
            {
                leftSideTransform = "twenty";
            }
            else if (leftSide == 3)
            {
                leftSideTransform = "thirty";
            }
            else if (leftSide == 4)
            {
                leftSideTransform = "forty";
            }
            else if (leftSide == 5)
            {
                leftSideTransform = "fifty";
            }
            else if (leftSide == 6)
            {
                leftSideTransform = "sixty";
            }
            else if (leftSide == 7)
            {
                leftSideTransform = "seventy";
            }
            else if (leftSide == 8)
            {
                leftSideTransform = "eighty";
            }
            else if (leftSide == 9)
            {
                leftSideTransform = "ninety";
            }

            if (rightSide == 1)
            {
                rightSideTransform = "one";
            }
            else if (rightSide == 2)
            {
                rightSideTransform = "two";
            }
            else if (rightSide == 3)
            {
                rightSideTransform = "three";
            }
            else if (rightSide == 4)
            {
                rightSideTransform = "four";
            }
            else if (rightSide == 5)
            {
                rightSideTransform = "five";
            }
            else if (rightSide == 6)
            {
                rightSideTransform = "six";
            }
            else if (rightSide == 7)
            {
                rightSideTransform = "seven";
            }
            else if (rightSide == 8)
            {
                rightSideTransform = "eight";
            }
            else if (rightSide == 9)
            {
                rightSideTransform = "nine";
            }

            if (number < 10)
            {
                if (number == 0)
                {
                    Console.WriteLine("zero");
                }
                else if (number == 1)
                {
                    Console.WriteLine("one");
                }
                else if (number == 2)
                {
                    Console.WriteLine("two");
                }
                else if (number == 3)
                {
                    Console.WriteLine("three");
                }
                else if (number == 4)
                {
                    Console.WriteLine("four");
                }
                else if (number == 5)
                {
                    Console.WriteLine("five");
                }
                else if (number == 6)
                {
                    Console.WriteLine("six");
                }
                else if (number == 7)
                {
                    Console.WriteLine("seven");
                }
                else if (number == 8)
                {
                    Console.WriteLine("eight");
                }
                else if (number == 9)
                {
                    Console.WriteLine("nine");
                }
            }

            else if (number < 20)
            {
                if (number == 10)
                {
                    Console.WriteLine("ten");
                }
                else if (number == 11)
                {
                    Console.WriteLine("eleven");
                }
                else if (number == 12)
                {
                    Console.WriteLine("twelve");
                }
                else if (number == 13)
                {
                    Console.WriteLine("thirteen");
                }
                else if (number == 14)
                {
                    Console.WriteLine("fourteen");
                }
                else if (number == 15)
                {
                    Console.WriteLine("fifteen");
                }
                else if (number == 16)
                {
                    Console.WriteLine("sixteen");
                }
                else if (number == 17)
                {
                    Console.WriteLine("seventeen");
                }
                else if (number == 18)
                {
                    Console.WriteLine("eighteen");
                }
                else if (number == 19)
                {
                    Console.WriteLine("nineteen");
                }
            }

            else if (number <= 99)
            {
                if (leftSide >= 2 && rightSide == 0)
                {
                    if (leftSide == 2)
                    {
                        Console.Write("twenty");
                    }
                    else if (leftSide == 3)
                    {
                        Console.Write("thirty");
                    }
                    else if (leftSide == 4)
                    {
                        Console.Write("forty");
                    }
                    else if (leftSide == 5)
                    {
                        Console.Write("fifty");
                    }
                    else if (leftSide == 6)
                    {
                        Console.Write("sixty");
                    }
                    else if (leftSide == 7)
                    {
                        Console.Write("seventy");
                    }
                    else if (leftSide == 8)
                    {
                        Console.Write("eighty");
                    }
                    else if (leftSide == 9)
                    {
                        Console.Write("ninety");
                    }
                }
                else if (leftSide >= 2 && (rightSide >= 1 && rightSide <= 9))
                {
                    Console.WriteLine($"{leftSideTransform} {rightSideTransform}");
                }
            }

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

        }
    }
}