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: An African American man smiling.
Hypothesis: The man is showing his teeth to a doctor.
Update: The man is knocking on a door

A: weakener
****
Q: Premise: Two males are sitting on a dock, one of which is playing guitar, and another two are standing in front of them.
Hypothesis: Two men are creating entertainment for money.
Update: The men wear work uniforms as they play for a few minutes and head back into their workplace.

A: weakener
****
Q: Premise: A white puppy walks down a dirt path trailing his leash on the ground behind him.
Hypothesis: The puppy is by himself.
Update: The puppy is being followed by its owner.

A:
weakener
****