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: construction 
Words: windlass, crane, dump truck, pelican, digger

Output: pelican


Input: Consider Input: Category: bird 
Words: concrete pourer, flamingo, egret, crane, duck

Output: concrete pourer


Input: Consider Input: Category: construction 
Words: windlass, crane, hoist, pelican, davit


Output: pelican