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: emotional status 
Words: worried, angry, jack, fret, emotional upsets

Ex Output:
jack


Ex Input:
Category: aesthetic characteristic 
Words: pretty, probation, neat, fine, level

Ex Output:
probation


Ex Input:
Category: weather 
Words: windy, brisk, mild, trustworthy, fair

Ex Output:

trustworthy