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: plain, mansion, condominium, squashed, flat

SOLUTION: plain

PROBLEM: fine, exquisite, mad, calm, comfortable

SOLUTION:
exquisite