using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Reverse the words of a sentence.");

        Console.Write("Enter string : ");

        string inputString = Console.ReadLine();

        string [] inputSplit = inputString.Split(' ');

        int length = inputSplit.Length;

        Console.WriteLine(length);

        for( int i = length-1; i>=0; i--) {

            Console.Write(inputSplit[i] + " ");

        }

    }

}