
############### MENU ###############
	Print common friends: (c/C)
	List users: (l/L)
	Quit: (q/Q)
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Enter choice: George: Nick Chris
Vana: John Marilyn Robert Michael
Susan:
Peter: Nick Katherine Marilyn
Nick: George Peter Robert
John: Vana Katherine Chris Robert
Mary: Chris Marilyn Nancy
Katherine: Peter John Linda Nancy
Chris: George John Mary Robert Linda
Marilyn: Vana Peter Mary Linda
Robert: Vana Nick John Chris Nancy
Michael: Vana Linda
Linda: Katherine Chris Marilyn Michael Nancy
Nancy: Mary Katherine Robert Linda

############### MENU ###############
	Print common friends: (c/C)
	List users: (l/L)
	Quit: (q/Q)
####################################

Enter choice: Enter 1st username: Enter 2nd username: 
Common friends of Nancy, John: Katherine Robert

############### MENU ###############
	Print common friends: (c/C)
	List users: (l/L)
	Quit: (q/Q)
####################################

Enter choice: Enter 1st username: Enter 2nd username: 
Common friends of Nancy, Chris: Mary Robert Linda

############### MENU ###############
	Print common friends: (c/C)
	List users: (l/L)
	Quit: (q/Q)
####################################

Enter choice: Enter 1st username: Enter 2nd username: 
Common friends of Susan, Robert:

############### MENU ###############
	Print common friends: (c/C)
	List users: (l/L)
	Quit: (q/Q)
####################################

Enter choice: 