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.

Ex Input:
Category: outdoor sport activity 
Words: whale, fish, raft, hiking, kayak

Ex Output:
whale


Ex Input:
Category: consumer product 
Words: joyful, program, activity, food, content

Ex Output:
joyful


Ex Input:
Category: consumer product 
Words: tools, content, books, panicked, file

Ex Output:

panicked