[C#] English Name Of The Last Digit

using System;

namespace Practice
{
    class Practice
    {
        static void Main()
        {
            int num = int.Parse(Console.ReadLine());
            string word = LastDigit(num);
            Console.WriteLine(word);
        }
        static string LastDigit(int n)
        {
            int tmp = n % 10;
            switch (tmp)
            {
                case 1: return "one";
                case 2: return "two";
                case 3: return "three";
                case 4: return "four";
                case 5: return "five";
                case 6: return "six";
                case 7: return "seven";
                case 8: return "eight";
                case 9: return "nine";
                default:
                    return "zero";
            }
        }
    }
}