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: animal 
Words: goat, stingray, tiger, hike, fish

Ex Output:
hike


Ex Input:
Category: employment activity 
Words: fire, hire, ground, pay, retire

Ex Output:
ground


Ex Input:
Category: aesthetic characteristic 
Words: level, size, light, clime, fair

Ex Output:

clime