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: police punishment 
Words: prison, fine, calm, money, suspension
Example Output: calm

Example Input: Category: secretary duty 
Words: organize, support, text, sort mail, file
Example Output: text

Example Input: Category: moral characteristic 
Words: frank, bold, brash, precise, pork
Example Output:
pork