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: police punishment 
Words: wispy, fine, probation, calm, prime

Output: calm


Input: Consider Input: Category: physical property 
Words: large, fat, capacitance, calories, ugly

Output: calories


Input: Consider Input: Category: physical activity 
Words: mallet, bend, jog, fall, duck


Output: mallet