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: type of sandwich 
Words: club, roll, doorstep, discothek, toast

Ex Output:
discothek


Ex Input:
Category: physical property 
Words: fat, angular momentum, ugly, capacitance, fiber

Ex Output:
fiber


Ex Input:
Category: shady activities 
Words: smuggled, fudge, cupcake, fix, lie

Ex Output:

cupcake