using System;

public class Program

{

     public static void Words(int num)

        {

            int[] digit=new int[4];

            String[] arsunit = new string[] { "","one", "two","three","four","five","six","seven","eight","nine" };

            String[] arstens = new string[] { "","eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };

            String[] arstens2 = new string[] { "","ten","twenty", "thirty", "fourty", "fifty", "sixty", "seventy", "eighty", "ninty" };

​

            int count = 0;

            int nummimic = num;

            while(nummimic>0)

            {

                digit[count]= nummimic%10;

                nummimic /= 10;

                count += 1;

            }

            if(count==1)

            {

                Console.WriteLine(arsunit[digit[0]]);

            }

​

            else if(count==2)

            {

                int tens = digit[1];

                if (tens == 1)

                {

                    if(digit[0]==0)

                        Console.WriteLine("ten");

                    else

                    Console.WriteLine(arstens[digit[0]]);

                }

                else

                    Console.WriteLine(arstens2[tens] +" "+ arsunit[digit[0]]);

            }

​

            else if(count==3)

            {

                int tens = digit[1];

                if (tens == 1)

                {

                    Console.WriteLine(arsunit[digit[2]] + " hundred and " + arstens[digit[0]]);

                }

                else

                    Console.WriteLine(arsunit[digit[2]] + " hundred and " + arstens2[tens] +" "+ arsunit[digit[0]]);

            }

​

            else if(count==4)

            {

                int tens = digit[1];

                if (tens == 1)

                    Console.WriteLine(arsunit[digit[3]] + " thousand " + arsunit[digit[2]] + " hundred and " + arstens[digit[0]]);

                else

                    Console.WriteLine(arsunit[digit[3]] + " thousand " + arsunit[digit[2]] + " hundred and " + arstens2[tens] +" "+ arsunit[digit[0]]);

            }

     }

    public static void Main()

    {

         Console.WriteLine("Enter number");

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

            Words(num);

    }

}