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: aesthetic characteristic 
Words: well, windy, even, fair, level

SOLUTION: windy

PROBLEM: Category: nutritional value 
Words: heavy, fat, protein, obese, carbs

SOLUTION: obese

PROBLEM: Category: direction 
Words: backward, melancholy, up, down, south

SOLUTION:
melancholy