03.EnglishNameOfLastDigit

using System;
namespace _03.EnglishNameOfLastDigit
{
    class Program
    {
        static void Main(string[] args)
        {
            long n = long.Parse(Console.ReadLine());

            long lastDigit = GetLastDigit(n);
            string englishName = string.Empty;

            Console.WriteLine(GetDigitName(lastDigit,englishName));

        }

        public static long GetLastDigit(long n)
        {
            long lastDigit = n % 10;

            return Math.Abs(lastDigit); // in case the number is negative
        }

        public static string GetDigitName(long lastDigit,string englishNameDigit)
        {
             englishNameDigit = string.Empty;

            switch (lastDigit)
            {
                case 0: englishNameDigit = "zero"; ; break;
                case 1: englishNameDigit = "one"; ; break;
                case 2: englishNameDigit = "two"; ; break;
                case 3: englishNameDigit = "three"; ; break;
                case 4: englishNameDigit = "four"; ; break;
                case 5: englishNameDigit = "five"; ; break;
                case 6: englishNameDigit = "six"; ; break;
                case 7: englishNameDigit = "seven"; ; break;
                case 8: englishNameDigit = "eight"; ; break;
                case 9: englishNameDigit = "nine"; ; break;
                default:
                    break;
            }

            return englishNameDigit;
        }
    }
}