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: ocean 
Words: signal, timely, brine, flow, current

Ex Output:
timely


Ex Input:
Category: guitar part 
Words: fret, concerned, jack, notes, amp

Ex Output:
concerned


Ex Input:
Category: shady activities 
Words: unlicensed, invent, lie, fudge, cookies

Ex Output:

cookies