In this task, you are given a premise, a hypothesis, and an update. The premise sentence describes a real-world situation and is always assumed to be true. The hypothesis sentence describes an assumption or inference that you might make about that situation having read the premise. The update provides additional information about the situation that might weaken or strengthen the hypothesis. A weakener is a statement that weakens the hypothesis, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.

Premise: A boy is doing a stunt with his skateboard.
Hypothesis: A boy is doing tricks at a skate park.
Update: The boy is in his driveway.
weakener

Premise: The cyclist is airborne on his bike as it makes a jump between two mounds of earth.
Hypothesis: A biker is making a sick jump on his expensive green bicycle over two ramps of earth.
Update: The professional BMX performer had been delighting proud all afternoon.
strengthener

Premise: A man wearing an orange hat and vest is walking next to railroad tracks.
Hypothesis: A man wearing an orange hat and vest is walking on the right side of railroad tracks.
Update: The man keeps looking down to his right.

weakener