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: window material 
Words: plastic, woodwork, glass, bowl, spyhole

Ex Output:
bowl


Ex Input:
Category: shady activities 
Words: replace, unwarranted, pie, fudge, unlicensed

Ex Output:
pie


Ex Input:
Category: chocolate food 
Words: cupcake, truffles, fudge, replace, molasses

Ex Output:

replace