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.

Input: Consider Input: Category: ocean 
Words: signal, timely, brine, flow, current

Output: timely


Input: Consider Input: Category: computers 
Words: prepare, space, file, image, ram

Output: prepare


Input: Consider Input: Category: employment activity 
Words: replace, remove, fire, scold, cool


Output: cool