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: emotional status 
Words: merchandise, angry, ecstatic, content, joyful

SOLUTION: merchandise

PROBLEM: Category: animal 
Words: hamster, mice, fish, tiger, row

SOLUTION: row

PROBLEM: Category: secretary duty 
Words: file, schedule appointments, make coffee, firewall, schedule

SOLUTION:
firewall