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: animal 
Words: ant, walk, bike, fly, dangle

SOLUTION: bike

PROBLEM: Category: moral characteristic 
Words: unprejudiced, unjust, milky, ok, fair

SOLUTION: milky

PROBLEM: Category: police punishment 
Words: fine, jail, arrest, firstrate, pretty

SOLUTION:
pretty