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: chocolate food 
Words: smuggled, brownie, fudge, pudding, truffles

Ex Output:
smuggled


Ex Input:
Category: secretary duty 
Words: correspondence, schedule, answer calls, keys, file

Ex Output:
keys


Ex Input:
Category: physical activity 
Words: cow, duck, crouch, fall, bow

Ex Output:

cow