class GroceryListLinked implements IGroceryList {

  GroceryNode head = null;
  int size = 0;

  GroceryListLinked() {}

  public boolean add(GroceryItem item) {

    GroceryNode newNode;
    newNode= new GroceryNode(item,null);
    newNode.setSuccessor(head.getSuccessor());
    head.setSuccessor = newNode;
    size++;

    return false;
  }

  public boolean remove(String name) {


    return false;
  }

  public boolean markAsBought(String name) {
    return false;
  }

  public void display() {

  }
}

class GroceryNode {
  GroceryItem data;
  GroceryNode next;

  GroceryNode(GroceryItem data, GroceryNode next) {
    this.data = data;
    this.next = next;
  }
}