using System;

​

class numToWords{

    public String numbers(int num){

        String[] once = {"Zero","One","Two","Three","Four","Five","Six","Seven","Eight","Nine"};

        String[] tenths = {"Ten","Evelen","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Ninteen"};

        String[] twenties = {"Twenty","Thirty","Fourty","Fifty","Sixty","Seventy","Eighty","Ninety"};

        String[] hundreds = {"One Hundred","Two Hundred","Three Hundred","Four Hundred","Five Hundred","Six Hundred","Seven Hundred","Eight Hundred","Nine Hundred"};

        String[] thousands = {"One Thousand","Two Thousand","Three Thousand","Four Thousand","Five Thousand","Six Thousand","Seven Thousand","Eight Thousand","Nine Thousand"};

        String num_tostring = num.ToString();

        int word_len = num_tostring.Length;

        String words = "";

        for(int i = 0; i <= word_len; i++){

            if(word_len == 4){

                int toNum = Convert.ToInt32(num_tostring[i]);

                words += thousands[toNum-1];

            }

            else if(word_len == 3){

                int toNum = Convert.ToInt32(num_tostring[i]);

                words += hundreds[toNum-1];

            }

            else if(word_len == 2){

                int toNum = Convert.ToInt32(num_tostring[i]);

                if(Convert.ToInt32(num_tostring[i]) == 1){

                    words += tenths[toNum];

                }

                else{

                    words += tenths[toNum-1];

                }

            }

            else if(word_len == 1){

                //int toNum = Convert.ToInt32(num_tostring[i]);

                // words += once[toNum-1];

                Console.WriteLine(num_tostring);

            }

        }

        return words;

    }

}

public class Program

{

    public static void Main()

    {

        int input;

        Console.Write("Enter a number: ");

        input = Convert.ToInt32(Console.ReadLine());

        numToWords nw = new numToWords();

        nw.numbers(input);

    }

}