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: police punishment 
Words: hearing, firstrate, alert, custody, fine

Ex Output:
alert


Ex Input:
Category: baby animals 
Words: follow, colt, fawn, cub, calf

Ex Output:
follow


Ex Input:
Category: personal characteristic 
Words: warm, ethical, cool, persistent, level

Ex Output:

warm