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: nutritional value 
Words: heavy, protein, fat, sugars, area

Ex Output:
area


Ex Input:
Category: accomodation 
Words: elevation, level, round, flat, townhome

Ex Output:
elevation


Ex Input:
Category: mode of transportation 
Words: cockroach, fly, flutter, flap, car

Ex Output:

cockroach