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: concerned, board, nervous, emotional, fret

Ex Output:
board


Ex Input:
Category: aesthetic characteristic 
Words: medium, just, light, ghostly, fair

Ex Output:
just


Ex Input:
Category: store status 
Words: running., barred, close, beside, gated

Ex Output:

beside