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: moral characteristic 
Words: milky, fair, ok, loyal, unprejudiced

Ex Output:
milky


Ex Input:
Category: consumer product 
Words: merchandise, happy, thing, content, service

Ex Output:
happy


Ex Input:
Category: aesthetic characteristic 
Words: fair, well, color, 70, level

Ex Output:

70