'''
Hello, This is purposely left empty for your practice.
Implement a circular linked list with following methods:
    - Displaying the list
    - Adding data to the back
    - Adding data in front
    - Adding data at an index
    - Deleting from front
    - Deleting from back
    - Deleting by index
    - Deleting by value
Let me know if you need any hint or help.
'''