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.
--------
Question: brash, frank, bun, hot dog, grub

Answer: brash


Question: late, up to the moment, current, course, belated

Answer: course


Question: just, fair, medium, tone, well

Answer:
just