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: acceptable, fine, comfortable, pretty, well

A: pretty
****
Q: brownie, fudge, wrongful, mangle, loosen

A: brownie
****
Q: dolphin, dog, fish, shark, raft

A:
raft
****