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: raining, sunny, fair, ghostly, windy
Example Output: ghostly

Example Input: Category: moral characteristic 
Words: precise, grub, frank, stern, honesty
Example Output: grub

Example Input: Category: chocolate food 
Words: cookies, molasses, cream, fudge, lie
Example Output:
lie