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: metal, handle, dish, glass, vinyl

Ex Output:
dish


Ex Input:
Category: aesthetic characteristic 
Words: 70, pale, fair, light, milky

Ex Output:
70


Ex Input:
Category: police punishment 
Words: mad, penalty, prison, jail time, fine

Ex Output:

mad