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: animal 
Words: fish, bat, sea turtle, trap, goat

Output: trap


Input: Consider Input: Category: outdoor sport activity 
Words: fish, hike, hunting, row, dog

Output: dog


Input: Consider Input: Category: nutritional value 
Words: ugly, big, fat, calories, sugar


Output: ugly