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: bird 
Words: crane, concrete pourer, goose, hoist, duck

Output: concrete pourer


Input: Consider Input: Category: animals 
Words: duck, jog, cat, pig, mallet

Output: jog


Input: Consider Input: Category: physical activity 
Words: jog, crouch, lion, sprint, duck


Output: lion