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: geographical property 
Words: horizontal, hotel, flat, lined, smooth

Ex Output:
hotel


Ex Input:
Category: moral characteristic 
Words: unprejudiced, unjust, milky, ok, fair

Ex Output:
milky


Ex Input:
Category: moral characteristic 
Words: courage, sausage, honest, harsh, frank

Ex Output:

sausage