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: aesthetic characteristic 
Words: cool, trustworthy, milky, fair, well

Ex Output:
trustworthy


Ex Input:
Category: social gathering 
Words: convention, club, discothek, hamburger, dance hall

Ex Output:
hamburger


Ex Input:
Category: emotional display 
Words: fawn, doe, flatter, follow, cajole

Ex Output:

doe