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: window material 
Words: panel, translucent fabric, spatula, metal, glass

Output: spatula


Input: Consider Input: Category: construction 
Words: windlass, crane, dump truck, pelican, digger

Output: pelican


Input: Consider Input: Category: moral characteristic 
Words: fair, just, impartial, balanced, raining


Output: raining