/**
 * SimpleDeque interface
 */
public interface SimpleDeque
{
	public void addFront(Object X);	// Add Object X at front of list
	public void addRear(Object X); 	// Add Object X at rear of list 
							// If array is full, add methods 
							// should do nothing

	public Object removeFront();  	// Remove and return object at 
							// front of list
	public Object removeRear();  		// Remove and return object at
							// rear of list
							// If array is empty, remove methods 
							// should do nothing
}