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: outdoor sport activity 
Words: dog, swim, hike, hiking, fish

Ex Output:
dog


Ex Input:
Category: temperature 
Words: cold, cool, icy, assured, mild

Ex Output:
assured


Ex Input:
Category: date status 
Words: jetstream, up to the moment, detests, current, dastards

Ex Output:

jetstream