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.

Q: Premise: People wait in chairs, one person has their shoe off.
Hypothesis: THe people are waiting to be called for their flight.
Update: They are at the doctor's office.

A: weakener
****
Q: Premise: Older men look out over a balcony.
Hypothesis: Older men are looking at the scenery.
Update: The balcony overlooks a stream and wildlife in the Montana mountains.

A: strengthener
****
Q: Premise: a black and white dog jumping into a pool with a lot of tennis balls in it.
Hypothesis: The dog is going after the tennis ball.
Update: The dog grabs a tennis ball.

A:
strengthener
****