Suppose, you are cleaning your reading table and keeping your books one upon another. Your
books are numbered are as 1,2,3,4,5. But you want your books to be ordered in such a way so
that when you pick up the first book and last book, those should be always 3 and 1, respectively.
The rest three books (2, 4 and 5) can be in any order.
Which collection is suitable here? Show its adding and removing methods in operation.
