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: ground, replace, combustion, flame, fire

Ex Output:
replace


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

Ex Output:
calcium


Ex Input:
Category: moral characteristic 
Words: stern, precise, weenie, frank, bold

Ex Output:

weenie