using System;

​

namespace ConsoleApp13

{

public class Program

{

    public static void Main()

    {

        String[] onesArray = new String[]

        {

            "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};

        String[] tensArray = new String[]

        {

            "", "", "twenty", "thirty", "fourty", "fifty", "sixty", "seventy", "eighty", "ninety" };

        int toConvert = int.Parse(Console.ReadLine());

        int thousands = toConvert / 1000;

        int thousandsRem = toConvert % 1000;

        int hundreds = thousandsRem / 100;

        int hundredsRem = thousandsRem % 100;

        int tens = hundredsRem / 10;

        int ones = hundredsRem % 10;

        String result1 = (thousands > 0)

            ? onesArray[thousands] + "thousand"

            : "" ;

        String result2 = (hundreds > 0)

            ? onesArray[hundreds] + "hundred"

            : "" ;

        String result3 = "" ;

        if (hundredsRem < 20)

            result3 = onesArray[tens] + " " + onesArray[ones];

        String output = result1 + " " + result2 + result3;

        Console.WriteLine(output.Trim());

        Console.ReadLine();

    }

}

}

​

​

​