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: Various people out and about in a public place on an autumn day.
Hypothesis: A group of classmates out and about in public on an autumn day.
Update: There is a school bus parked nearby.
strengthener

Premise: A barefoot young boy glances at the camera while swinging in a park.
Hypothesis: Billy loves to swing high while his Dad pushes him.
Update: The boy's face is covered in tears.
weakener

Premise: A boy with whipped cream on his face after smooshing his face into a pie.
Hypothesis: A boy had a pie thrown into his face as practical joke.
Update: The boy was holding the pie that went on his face.

weakener