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: mallet, goose, geese, hike, duck

A: hike
****
Q: smooshed, horizontal, condominium, flat, valley

A: condominium
****
Q: jump, fall, climb, run, summer

A:
summer
****