import java.util.*;
 

class queuehelp
 { List q = new LinkedList();   
 
 // should be able to put ArrayList or Linked List here                            
 // and it should still work
// only use member functions that implement List Interface
  
  public boolean isEmpty()
     {
      }


      public void enqueue(Object o)
       {
	    }


	  public Object dequeue()
	   {
        }

      public Object peekFront()
       {
       }
   }