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: computers 
Words: folder, text, file, ram, prepare

Ex Output:
prepare


Ex Input:
Category: physical property 
Words: fat, large, ugly, protein, skinny

Ex Output:

protein