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: A dark-haired man in a striped shirt records a video of a gray-haired man using a MacBook laptop.
Hypothesis: The dark-haired man does not know the man who is using a laptop.
Update: The dark haired man asks the producer who the guy using the laptop is.

A: strengthener
****
Q: Premise: The black dog is by a soccer ball and the brown dog is running.
Hypothesis: Two dogs are playing together on a soccer field.
Update: The dogs are playing in their backyard.

A: weakener
****
Q: Premise: Two elderly people sit in handicapped chairs on a train.
Hypothesis: Two people are on a long train ride.
Update: Mountains can be see out the window.

A:
strengthener
****