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: animal 
Words: walk, flap, fish, fly, bats

Ex Output:
flap


Ex Input:
Category: weather 
Words: sunny, loyal, tangle, fair, raining

Ex Output:
loyal


Ex Input:
Category: guitar part 
Words: inlays, concerned, string, notes, fret

Ex Output:

concerned