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.

Example Input: Category: ocean 
Words: late, wave, blue, current, drink
Example Output: late

Example Input: Category: elements 
Words: let go, flame, inferno, fire, water
Example Output: let go

Example Input: Category: emotional display 
Words: deer, fawn, paw, woo, cajole
Example Output:
deer