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: employment activity 
Words: recruit, replace, sack, heat, fire

Ex Output:
heat


Ex Input:
Category: moral characteristic 
Words: windy, fair, just, ok, loyal

Ex Output:
windy


Ex Input:
Category: accomodation 
Words: valley, house, cabin, squashed, flat

Ex Output:

valley