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: food 
Words: honesty, meat, hot dog, sausage, frank

Output: honesty


Input: Consider Input: Category: emotional display 
Words: social, identity, colt, fawn, follow


Output: colt