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: physical activity 
Words: sprint, get down, cow, duck, bow

SOLUTION: cow

PROBLEM: Category: employment activity 
Words: recruit, replace, sack, heat, fire

SOLUTION: heat

PROBLEM: Category: aesthetic characteristic 
Words: fine, exquisite, classy, happy, dull

SOLUTION:
happy