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: joyful, program, activity, food, content

SOLUTION: joyful

PROBLEM: Category: police punishment 
Words: jail, fine, bright, arrest, flyaway

SOLUTION: bright

PROBLEM: Category: boxing terminology 
Words: head, box, deck, blocking, punch

SOLUTION:
head