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: activity 
Words: fritter, waste, pie, waste away, lollygag

Ex Output:
pie


Ex Input:
Category: boats 
Words: deck, call, galley, bridge, stern

Ex Output:
call


Ex Input:
Category: weather 
Words: sunny, fair, warm, unprejudiced, windy

Ex Output:

unprejudiced