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: weather 
Words: cold, 70, fair, well, luke
Example Output: well

Example Input: Category: food 
Words: blunt, entree, frank, wienerwurst, bun
Example Output: blunt

Example Input: Category: geographical property 
Words: flat, level, plain, even, paved
Example Output:
level