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: date status 
Words: belated, current, tide, up to the moment, postponed

Ex Output:
tide


Ex Input:
Category: personal characteristic 
Words: ethical, tropical, unflappalbe, cool, optimist

Ex Output:
tropical


Ex Input:
Category: employment activity 
Words: empower, scold, fire, cool, replace

Ex Output:

cool