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: physical activity 
Words: bend, winter, fall, climb, exercise

Output: winter


Input: Consider Input: Category: animal 
Words: bird, fish, fly, drive, eagle

Output: drive


Input: Consider Input: Category: employment activity 
Words: scold, remove, inferno, fire, pay


Output: inferno