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: type of sandwich 
Words: picnic, open-faced, club, grilled cheese, lettuce

SOLUTION: picnic

PROBLEM: Category: weather 
Words: brisk, unprejudiced, fair, endure, clime

SOLUTION: unprejudiced

PROBLEM: Category: moral characteristic 
Words: decent, fair, balanced, brisk, trustworthy

SOLUTION:
brisk