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: employment activity 
Words: sack, inferno, promote, empower, fire

SOLUTION: inferno

PROBLEM: Category: aesthetic characteristic 
Words: pretty, probation, neat, fine, level

SOLUTION: probation

PROBLEM: Category: weather 
Words: light, cold, windy, luke, fair

SOLUTION:
light