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.

Q: hardware, firewall, file, format, order office supplies

A: order office supplies
****
Q: trustworthy, milky, fair, equitable, decent

A: milky
****
Q: concerted, corporation, rigged, firm, private

A:
rigged
****