/**
 * An ordered list of items.
 */
public interface ItemList<E> {
     /**
      * Append an item to the end of the list
      *
      * @param item – item to be appended
      */


public void append(E item) {

}

     /**
      * Insert an item at a specified index
      *
      * @param index – index where to insert the item
      * @param item – item to be inserted
      * @throw IndexOutOfBoundsException if index is < 0 or >= no of items
      */
public void insert(int index, E item);

/**
 * Remove all items from the list
 */
public void clear();

/**
      * Return an item at a specified index
      *
      * @param index – index of the item to return
      * @return the item at the specified index
      * @throw IndexOutOfBoundsException if index is < 0 or >= no of items
      */
public E get(int index) {

}



/**
      * Return the index of the first occurrence of an item in the list.
      *
      * @return index of the first occurrence in the list, -1 if not found
      */
public int indexOf(E item);


/**
 * Return an ItemIterator to iterate over items in the list.
 *
 * @return an ItemIterator to iterate over items in the list
 */
public ItemIterator<E> iterator();

/**
      * Remove an item at a specified index
      *
      * @param index – index of the item to be removed
      * @return the removed item
      * @throw IndexOutOfBoundsException if index is < 0 or >= no of items
      */
public E remove(int index);

/**
      * Remove the first occurrence of an item in the list.
      *
      * @item – item to be removed
      * @return true if an occurrence of the item was found and removed,
      *         otherwise false
      */
public boolean remove(E item);



/**
 * Return the number of items currently in the list
 *
 * @return the number of items in the list
 */
public int noItems();
}

/**
 * An iterator over an ItemList
 */
public interface ItemIterator<E> {
/**
 * Return true if the iteration has more items
 *
 * @return true if the iteration has more items, otherwise false
 */
public boolean hasMoreItems();

/**
 * Return next item from iteration
 *
 * @return next item from iteration
 * @throw NoSuchElementException if the iteration has no more items
 */
public E nextItem();
}