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: aesthetic characteristic 
Words: fine, ticket, dull, neat, detailed

Ex Output:
ticket


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

Ex Output:
timely


Ex Input:
Category: geographical property 
Words: valley, flat, cabin, level, plane

Ex Output:

cabin