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: consumer product 
Words: merchandise, happy, thing, content, service

SOLUTION: happy

PROBLEM: Category: geographical property 
Words: studio, hill, flat, even, horizontal

SOLUTION: studio

PROBLEM: Category: geographical property 
Words: flat, mountain, even, squashed, level

SOLUTION:
squashed