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: emotional status 
Words: left, emotional state, sad, emotional upsets, down

Output: left


Input: Consider Input: Category: animal 
Words: shark, dolphin, fish, hunting, cat

Output: hunting


Input: Consider Input: Category: animal 
Words: shark, horse, swim, fish, hamster


Output: swim