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: corporate 
Words: corporation, firm, alignment, taut, leverage

Ex Output:
taut


Ex Input:
Category: aesthetic characteristic 
Words: fair, medium, size, light, loyal

Ex Output:
loyal


Ex Input:
Category: boxing terminology 
Words: lifeline, knockout, deck, punch, tko

Ex Output:

lifeline