Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Example Input: rudder, bow, pack, crew, deck
Example Output: pack

Example Input: fudge, banned, brownie, unwarranted, fib
Example Output: brownie

Example Input: fiber, fat, calories, capacitance, salt
Example Output:
capacitance