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: fire, remove, praise, inferno, replace

Ex Output:
inferno


Ex Input:
Category: animal 
Words: jump, drive, fly, eagle, beetle

Ex Output:
drive


Ex Input:
Category: emotional status 
Words: jealous, books, content, joyful, nervous

Ex Output:

books