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: social gathering 
Words: group, dance hall, clan, club, dagwood

Ex Output:
dagwood


Ex Input:
Category: type of rigidity 
Words: unbending, unyielding, inflexible, firm, streamline

Ex Output:
streamline


Ex Input:
Category: date status 
Words: belated, jetstream, detestings, current, delayed

Ex Output:

jetstream