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: fish, bat, mice, dog, hiking

A: hiking
****
Q: acceptable, mad, fine, comfortable, probation

A: probation
****
Q: divide, fritter, dessert, whittle, spend

A:
dessert
****