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

Ex Input:
Category: physical property 
Words: large, fat, capacitance, calories, ugly

Ex Output:
calories


Ex Input:
Category: type of sandwich 
Words: clan, lettuce, bacon, club, submarine

Ex Output:
clan


Ex Input:
Category: employment activity 
Words: praise, fire, remove, pay, cool

Ex Output:

cool