Create a class FacebookLikeManager with three public methods.

The purpose of this class is to ingest this users.txt file and process it as to later provide information about those users.

users.txt

Mike: Kristen, Sara, Nate, Anthony, Randy
	Kristen: Mike, John, Steve, Bill
	Bill: Sara, Nate
	Sara: Nate, Anthony

A line in the file will look something like this:

Mike: Steve, John, Tony

This line represents that the users Steve, John, and Tony have liked the user Mike.

The three public methods will be:

a public List getAllUsers()

This will return a unique list of all users that appeared in the file. Note: All names in the file are users. Even if a user only appears when liking someone, they will be present in the List returned by getAllUsers.

b public List getLikes(String user)

This will take a String representing a user (like Mike) and return a unique List containing all of the users that have liked the user Mike.

c public List getLikedBy(String user)

This will take a String representing a user (like Tony) and return a unique List containing each user that Tony has liked.

create a Main to test your work.