/**
 ******************************************************************************
 *                    HOMEWORK: 15-111
 ******************************************************************************
 *                    A medley of recursive methods
 ******************************************************************************
 *
 * Phonewords
 *
 *
 * @author
 * @date
 *****************************************************************************/

import java.util.Set;
import java.lang.UnsupportedOperationException;

public class Phonewords
{

	public Set<String> generateAllPhoneWords(String phonenumber)
	{
		throw new UnsupportedOperationException("You need to implement this method");
	}

}