using System;
using System.Collections.Generic;
using System.Linq;

namespace Problem_02
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine(GetLastDigitAsWord(12309));
        }

        static string GetLastDigitAsWord(int number)
        {
            string[] digitNames = {"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"};
            string numStr = number.ToString();
            numStr.ToCharArray();
            char numberOfInterest = numStr[numStr.Length-1];
            string numberOfInterestAsString = numberOfInterest.ToString();
            int parsedNumberOfInterest = int.Parse(numberOfInterestAsString);
            string res = digitNames[parsedNumberOfInterest];
            return res;
        }
    }
}