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: shady activities 
Words: fudge, banned, brownie, unwarranted, fib

Ex Output:
brownie


Ex Input:
Category: computers 
Words: ram, file, prepare, keys, format

Ex Output:
prepare


Ex Input:
Category: animals 
Words: elephant, duck, horse, dog, hike

Ex Output:

hike