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: outdoor sport activity 
Words: dog, swim, hike, hiking, fish

Output: dog


Input: Consider Input: Category: police punishment 
Words: fine, prime, firstrate, comfortable, ticket

Output: comfortable


Input: Consider Input: Category: outdoor sport activity 
Words: fish, canoe, hunting, hiking, iguana


Output: iguana