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: accomodation 
Words: mansion, mountain, flat, house, duplex

Ex Output:
mountain


Ex Input:
Category: physical property 
Words: brittleness, large, fat, area, calcium

Ex Output:
calcium


Ex Input:
Category: moral characteristic 
Words: fair, dishonest, deal, equitable, trustworthy

Ex Output:

deal