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: elements 
Words: water, heat, fire, empower, cool

Ex Output:
empower


Ex Input:
Category: moral characteristic 
Words: unprejudiced, texture, fair, impartial, well

Ex Output:
texture


Ex Input:
Category: type of sandwich 
Words: community, bacon, hero, hoagie, club

Ex Output:

community