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: measurement unit 
Words: ounce, ear, inch, foot, milimeter

Output: ear


Input: Consider Input: Category: outdoor sport activity 
Words: swim, wrestle, fish, canyoning, horse

Output: horse


Input: Consider Input: Category: food 
Words: meat, hot dog, frank, sausage, fortitude


Output: fortitude