import java.io.*;
import com.mw.io.*;
import structure.*;

public class MySinglyLinkedList extends SinglyLinkedList {

	public void reverse () {
		SinglyLinkedListElement p = null;
		SinglyLinkedListElement q = head;
		while (q != null) {
		   head = q.next();
		   q.setNext(p);
		   p = q;
		   q = head;
		}
		head = p;
    }
}

class ListBuilder2 {
// Program to build a singly-linked list, from a series of
// words typed by the user, and then display it.
// The class SinglyLinkedList is used to supply the methods
// for building the list.

	public static void main (String args[]) {

      SystemInput sysIn = new SystemInput();
      ReadStream r = new ReadStream();
      String s;
      
      MySinglyLinkedList words = new MySinglyLinkedList(); // List of words to be built 
      
      System.out.println("Enter a series of words, followed by Command-D");
      s = r.readString();
      while (! r.eof()) {
         // link s to the tail end of the list
         words.addToTail(s);    
         s = r.readString();
      }
      
      // now reverse the list
      words.reverse();
      
      // now display the list
      int count = words.size();           // size of the list
      System.out.println("The words entered are, in reverse order:");
      while (!words.isEmpty()) {
         s = (String)words.removeFromHead();
         System.out.println(s);
      } 
      System.out.println(count + " words were entered.");     
	}
}