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: string, frustrated, chord, output cord, fret

SOLUTION: frustrated

PROBLEM: promote, empower, fire, ice, ban

SOLUTION: ice

PROBLEM: replace, pie, fudge, chocolate, rich

SOLUTION:
replace