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: trap, dog, fish, tiger, horse

Output: trap


Input: Consider Input: Category: secretary duty 
Words: folder, support, order office supplies, correspondence, file

Output: folder


Input: Consider Input: Category: weather 
Words: variety, make the grade, warm, brisk, fair


Output: variety