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: type of sandwich 
Words: submarine, burger, bar, lettuce, club

Output: bar


Input: Consider Input: Category: police punishment 
Words: wispy, fine, probation, calm, prime

Output: calm


Input: Consider Input: Category: elements 
Words: ice, air, fire, hire, combustion


Output: hire