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: bird 
Words: ostrich, digger, sandpiper, crane, goose
Example Output: digger

Example Input: Category: weather 
Words: brisk, unprejudiced, fair, endure, clime
Example Output: unprejudiced

Example Input: Category: shady activities 
Words: smear, lie, pudding, invent, fudge
Example Output:
pudding