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: signal, timely, brine, flow, current
Example Output: timely

Example Input: Category: mode of transportation 
Words: bee, swim, fly, car, walk
Example Output: bee

Example Input: Category: fried food 
Words: patty, fritter, cake, misuse, pastry
Example Output:
misuse