//Recursion: Program - Reverse Sentence

import java.io.*;
import java.util.*;

class myWordReverse
{
     static BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
     static ArrayList sentence = new ArrayList();	        // declare an array of integers

   	public static void main(String[] args) throws IOException
   	{
		String input;
		int i;

		System.out.print("please enter the sentence: ");
		input=keyboard.readLine();

		my_Reverse(input);
		for (i=1;i<=sentence.size();i++)
		{
			System.out.print(sentence.get(i-1)+" ");
		}
   	}
	public static void my_Reverse(String input)
	{
	 int pos;
	 String current;
	 if (input.length()==0)
	 {    
		System.out.println("finish!");
		return;
	 }
	 pos= input.indexOf(" ");
         if (pos==-1)
	 {
		current=input;
		sentence.add(current);
		return;
	 }
         else
	 {
		current=input.substring(0,pos);
		input=input.substring(pos+1);
		my_Reverse(input);
		sentence.add(current);
	 }
	}

}