import java.util.*;

public class StringExample {

    public static void main (String[] argv)
    {
	// Make a tree (of strings) and add stuff to it.
	TreeSet<String> tribes = new TreeSet<String>();
	tribes.add ("Ewok");
	tribes.add ("Aqualish");
	tribes.add ("Gungan");
	tribes.add ("Amanin");
	tribes.add ("Jawa");
	tribes.add ("Hutt");
	tribes.add ("Cerean");

	// Get the data structure to return an object that does the iteration.
	Iterator iter = tribes.iterator ();

	// Now use the iterator object to perform iteration.
	while (iter.hasNext()) {
	    String name = (String) iter.next ();
	    System.out.println (name);
	}
    }

}