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: stingray, horse, iguana, wrestle, fish

SOLUTION: wrestle

PROBLEM: Category: police punishment 
Words: prison, fine, calm, money, suspension

SOLUTION: calm

PROBLEM: Category: secretary duty 
Words: space, support, schedule appointments, errands, file

SOLUTION:
space