import hsa.Stdin;
class LinkedListAssignment
{
    public static void main (String [] args)
    {
	// Create a List for this course
	List CompSci = new List ();
	String temp;
	System.out.print ("Enter a name to add to the class list: ");
	String input = Stdin.readString ();


	//Continuously add names to list until user types "zzz" or "ZZZ"
	while (input.compareTo ("zzz") != 0 && input.compareTo ("ZZZ") != 0)
	{
	    CompSci.insert (input);

	    System.out.print ("Enter a name to add to the class list: ");
	    input = Stdin.readString ();

	}

	// print list
	CompSci.printList ();

    }
}

class List
{
    // This class contains methods that manipulate a linked list
    // whose nodes contain strings in their name fields


    // List object contains only a head whose purpose is to
    // point to the first object in the list
    Student head;


    public List ()
    {
	// a basic constructor

	head = null;
    }


    public void printList ()
    {
	// print the contents of a list

	Student temp = head;
	while (temp != null)
	{
	    System.out.println (temp.name);
	    temp = temp.link;
	}
    }


    public void insert (String s)
    {
	// insert a new node containing s in its name field into a list whose nodes
	// are kept in increasing lexicographic order


    }




    class Student
    {
	// an inner class for nodes of a list

	String name;
	Student link;

	public Student (String word, Student next)
	{
	    // a simple constructor

	    name = word;
	    link = next;
	}
    }
}