DigitasWord

using System;
class DigitAsWord
{
    static void Main()
    {
        string n = Console.ReadLine();
        switch (n)
        {
            case "0": Console.WriteLine("zero"); break;
            case "1": Console.WriteLine("one"); break;
            case "2": Console.WriteLine("two"); break;
            case "3": Console.WriteLine("three"); break;
            case "4": Console.WriteLine("four"); break;
            case "5": Console.WriteLine("five"); break;
            case "6": Console.WriteLine("six"); break;
            case "7": Console.WriteLine("seven"); break;
            case "8": Console.WriteLine("eight"); break;
            case "9": Console.WriteLine("nine"); break;
            default: Console.WriteLine("not a digit"); break;
        }
      }
   }