TASK DEFINITION: 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.
PROBLEM: Category: direction 
Words: down, opposite of up, sliding, forward, emotional state

SOLUTION: emotional state

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

SOLUTION: discothek

PROBLEM: Category: fried food 
Words: fritter, cake, blow, sweet roll, danish

SOLUTION:
blow