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.

Example Input: Category: widespread 
Words: average, typical, common, general, admiral
Example Output: admiral

Example Input: Category: baby animals 
Words: cub, identity, buck, fawn, kid
Example Output: identity

Example Input: Category: direction 
Words: falling, down, unhappy, descending, ground
Example Output:
unhappy