using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        Console.Write("Enter any message:");

        string t1 = Console.ReadLine();

        Console.WriteLine("there are {0} words, ", CountWords(t1));

    }

​

    static int CountWords (string s)

    {

        return Regex.Matches(s, @"[A-Za-z0-9']+").Count;

    }

}