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: moral characteristic 
Words: mild, equitable, unprejudiced, trustworthy, fair

Ex Output:
mild


Ex Input:
Category: type of sandwich 
Words: open-faced, hero, club, discothek, hamburger

Ex Output:
discothek


Ex Input:
Category: food 
Words: bun, honest, vittles, goodies, frank

Ex Output:

honest