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: computers 
Words: errands, file, download, text, folder
Example Output: errands

Example Input: Category: weather 
Words: windy, 70, mild, fair, loyal
Example Output: loyal

Example Input: Category: animals 
Words: fall, pig, mallet, goose, duck
Example Output:
fall