def METHOD_NAME():
    tree = AvlTree()
    root = None
    while True:
        print("Choose an operation :\n1. INSERTION\n2. DELETION\n3. PREORDER TRAVERSAL\n4. Exit Program")
        ch = int(input("\tMAKE YOUR CHOICE : "))
        if ch == 1:
            ele = int(input("\nEnter the element for insertion : "))
            tree.insertNode(root, ele)
        elif ch == 2:
            ele = int(input("\nEnter the element for deletion : "))
            tree.delete(root, ele)
        elif ch == 3:
            print("\nPREORDER TRAVERSAL :", end=" ")
            tree.preOrderTraversal(root)
        elif ch == 4:
            exit(1)