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: fawn, social, cub, kid, colt

A: social
****
Q: condominium, duplex, studio, flat, level

A: level
****
Q: replace, recruit, hire, inferno, fire

A:
inferno
****