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: animal 
Words: hamster, mice, fish, tiger, row
Example Output: row

Example Input: Category: moral characteristic 
Words: milky, fair, ok, loyal, unprejudiced
Example Output: milky

Example Input: Category: weather 
Words: make the grade, texture, luke, fair, endure
Example Output:
texture