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: cool, trustworthy, milky, fair, well

SOLUTION: trustworthy

PROBLEM: Category: animal 
Words: pounce, fly, swim, walk, walk

SOLUTION: walk

PROBLEM: Category: bird 
Words: ostrich, hoist, egret, crane, parrot

SOLUTION:
hoist