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: glass, spyhole, handle, coating, knive

Output: knive


Input: Consider Input: Category: bird 
Words: crane, pelican, egret, hummingbird, upraise

Output: upraise


Input: Consider Input: Category: moral characteristic 
Words: fair, loyal, decent, fine, tone


Output: tone