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, synergy, tough, concerted

Ex Output:
tough


Ex Input:
Category: outdoor sport activity 
Words: wrestle, fish, iguana, hiking, hunt

Ex Output:
iguana


Ex Input:
Category: kitchenware 
Words: spoon, plate, panel, colander, glass

Ex Output:

panel