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: down, kind, opposite of up, lower, ground

SOLUTION: kind

PROBLEM: inlays, concerned, string, notes, fret

SOLUTION: concerned

PROBLEM: water, pay, air, earth, fire

SOLUTION:
pay