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: emotional status 
Words: alright, alert, fine, detached, level

Ex Output:
level


Ex Input:
Category: measurement unit 
Words: ounce, foot, kilometer, milimeter, heel

Ex Output:
heel


Ex Input:
Category: moral characteristic 
Words: impartial, fair, equitable, level, ok

Ex Output:

level