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: suspension, exquisite, prime, fine, flyaway
Example Output: exquisite

Example Input: Category: moral characteristic 
Words: frank, stern, bun, concise, precise
Example Output: bun

Example Input: Category: date status 
Words: current, dastards, early, course, data sets
Example Output:
course