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: physical activity 
Words: trip, jump, fall, equinox, exercise

Output: equinox


Input: Consider Input: Category: direction 
Words: remorseful, south, descending, downward, down

Output: remorseful


Input: Consider Input: Category: baby animals 
Words: fawn, kitten, calf, paw, buck


Output: paw