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: activity 
Words: fritter, sweet roll, whittle, seperate, divide
Example Output: sweet roll

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

Example Input: Category: secretary duty 
Words: file, fax, hardware, make coffee, correspondence
Example Output:
hardware