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: windlass, excavator, crane, hummingbird, steam roller

A: hummingbird
****
Q: brash, frank, bun, hot dog, grub

A: brash
****
Q: fair, well, alright, size, variety

A:
alright
****