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.

Ex Input:
Category: date status 
Words: belated, current, tide, up to the moment, postponed

Ex Output:
tide


Ex Input:
Category: bird 
Words: neck, tackle, derrick, crane, steam roller

Ex Output:
steam roller


Ex Input:
Category: construction 
Words: digger, hoist, davit, crane, neck

Ex Output:

neck