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: People gathered outside a building in the dark.
Hypothesis: people are gathered outside a building because it's a night time fire drill.
Update: An ear-splitting alarm is going off.
strengthener

Premise: A man is driving a white van sprayed painted with graffiti.
Hypothesis: A man is driving away from some cops.
Update: The man forgot his wallet at work.
weakener

Premise: A man doing an aerial stunt on a bike.
Hypothesis: A stunt man performs a bike trick for a movie shoot.
Update: The man is wearing an X Games bib.

weakener