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: fire, hire, ground, pay, retire

SOLUTION: ground

PROBLEM: Category: baby animals 
Words: bambi, cub, doe, lust, fawn

SOLUTION: lust

PROBLEM: Category: physical property 
Words: thin, calories, fat, obese, chunky

SOLUTION:
calories