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: nervous, frustrated, fret, jack, concerned

Ex Output:
jack


Ex Input:
Category: computers 
Words: folder, document, file, image, correspondence

Ex Output:
correspondence


Ex Input:
Category: aesthetic characteristic 
Words: high quality, fine, relaxed, neat, hot

Ex Output:

relaxed