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.

Ex Input:
Category: ocean 
Words: current, wave, whirlpool, sea, data sets

Ex Output:
data sets


Ex Input:
Category: moral characteristic 
Words: variety, fine, fair, ok, balanced

Ex Output:
variety


Ex Input:
Category: police punishment 
Words: fine, prime, jail time, suspension, decent

Ex Output:

decent