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: soar, cockroach, walk, fly, run

Ex Output:
soar


Ex Input:
Category: type of sandwich 
Words: hoagie, burger, hamburger, club, discothek

Ex Output:
discothek


Ex Input:
Category: bird 
Words: hoist, crane, flamingo, hummingbird, sandpiper

Ex Output:

hoist