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.

Input: Consider Input: Category: nutritional value 
Words: iron, heavy, vitamin c, fat, brittleness

Output: brittleness


Input: Consider Input: Category: boats 
Words: deck, call, galley, bridge, stern

Output: call


Input: Consider Input: Category: animal 
Words: fish, shark, wrestle, stingray, whale


Output: wrestle