[Class] ReverseBidirectionalIterator [Description] 
Defines an iterator that accesses elements in a container in the reverse direction. Elements can be accessed in the forward direction by using the decrement operator and in the backward direction by using the increment operator. The element that the iterator points to can be both written to and read from any number of times. Reverse bidirectional iterators can be used anywhere that a reverse input or reverse output iterator is required.