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.

Example Input: Category: physical activity 
Words: drop, fall, leaves, bend, exercise
Example Output: leaves

Example Input: Category: type of sandwich 
Words: roll, hoagie, bacon, club, community
Example Output: community

Example Input: Category: weather 
Words: luke, raining, pale, deal, fair
Example Output:
pale