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: consumer product 
Words: content, books, thing, program, jealous

Output: jealous


Input: Consider Input: Category: physical activity 
Words: trip, jump, fall, equinox, exercise

Output: equinox


Input: Consider Input: Category: corporate 
Words: common, concerted, solid, firm, sustainability


Output: solid