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: consumer product 
Words: joyful, program, activity, food, content

Ex Output:
joyful


Ex Input:
Category: emotional status 
Words: nervous, frustrated, fret, jack, concerned

Ex Output:
jack


Ex Input:
Category: aesthetic characteristic 
Words: dull, there, fine, hearing, attractive

Ex Output:

hearing