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, clan, team, club, doorstep

Ex Output:
doorstep


Ex Input:
Category: emotional status 
Words: fine, relaxed, comfortable, prime, content

Ex Output:
prime


Ex Input:
Category: weather 
Words: 70, fair, color, stormy, tangle

Ex Output:

color