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: activity 
Words: blow, waste away, sweet roll, whittle, fritter

Output: sweet roll


Input: Consider Input: Category: physical property 
Words: ugly, protein, large, heavy, fat

Output: protein


Input: Consider Input: Category: outdoor sport activity 
Words: hunt, shark, fish, hunting, trap


Output: shark