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: dog, push, duck, squat, jog

A: dog
****
Q: fire, hire, heat, inferno, earth

A: hire
****
Q: fearful, content, merchandise, shop, program

A:
fearful
****