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: animal 
Words: ant, walk, bike, fly, dangle

Output: bike


Input: Consider Input: Category: shady activities 
Words: unwarranted, mangle, cream, loosen, fudge

Output: cream


Input: Consider Input: Category: aesthetic characteristic 
Words: fine, level, pretty, attractive, arrest


Output: arrest