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: fair, color, unprejudiced, fine, decent

SOLUTION: color

PROBLEM: current, flow, history, signal, jetstream

SOLUTION: history

PROBLEM: type, order office supplies, errands, firewall, file

SOLUTION:
firewall