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: aesthetic characteristic 
Words: trustworthy, variety, tone, ghostly, fair

Ex Output:
trustworthy


Ex Input:
Category: physical property 
Words: protein, pasty, fat, thin, angular momentum

Ex Output:
protein


Ex Input:
Category: corporate 
Words: firm, leverage, rigged, alignment, llc

Ex Output:

rigged