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: board, bored, emotional supports, frustrated, fret

Ex Output:
board


Ex Input:
Category: aesthetic characteristic 
Words: mild, fair, texture, even, milky

Ex Output:
mild


Ex Input:
Category: date status 
Words: current, up to the moment, do tests, delayed, water

Ex Output:

water