TASK DEFINITION: Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
PROBLEM: merchandise, specialty, tools, content, angry

SOLUTION: angry

PROBLEM: ounce, foot, kilometer, milimeter, heel

SOLUTION: heel

PROBLEM: raining, tone, even, fair, cool

SOLUTION:
raining