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: normal, commander, sargent, private, general

A: normal
****
Q: townhome, mountain, studio, flat, apartment

A: mountain
****
Q: inferno, empower, scold, replace, fire

A:
inferno
****