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: physical activity 
Words: bend, jog, get down, duck, pig

Ex Output:
pig


Ex Input:
Category: shady activities 
Words: cookies, wrongful, fudge, smuggled, smear

Ex Output:
cookies


Ex Input:
Category: bird 
Words: windlass, crane, duck, egret, neck

Ex Output:

windlass