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 display 
Words: follow, doe, suppressed, culture, fawn

Ex Output:
doe


Ex Input:
Category: boxing terminology 
Words: glove, level, deck, corner, board

Ex Output:
board


Ex Input:
Category: type of sandwich 
Words: doorstep, club, burger, submarine, group

Ex Output:

group