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: hamster, fish, tiger, canyoning, sea turtle

SOLUTION: canyoning

PROBLEM: Category: consumer product 
Words: content, books, thing, program, jealous

SOLUTION: jealous

PROBLEM: Category: direction 
Words: kind, below, down, falling, ground

SOLUTION:
kind