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: moral characteristic 
Words: even, equitable, unprejudiced, fair, impartial

Ex Output:
even


Ex Input:
Category: type of rigidity 
Words: rigged, firm, unyielding, streamline, taut

Ex Output:
streamline


Ex Input:
Category: social gathering 
Words: club, meeting, group, doorstep, clan

Ex Output:

doorstep