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: chocolate food 
Words: rich, chocolate, fudge, chocolate cake, unwarranted

Ex Output:
unwarranted


Ex Input:
Category: emotional status 
Words: worried, angry, jack, fret, emotional upsets

Ex Output:
jack


Ex Input:
Category: police punishment 
Words: prime, penalty, fine, mad, arrest

Ex Output:

mad