TASK DEFINITION: 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.
PROBLEM: Premise: People hurrying to get to work in a busy city.
Hypothesis: People waiting at a bus stop.
Update: The people wait on the sidewalk as a bus pulls up by them.

SOLUTION: strengthener

PROBLEM: Premise: A man in a pink shirt stands next to a stack of hats.
Hypothesis: A man is standing next to the hat display in the store.
Update: The man has shopping bags with him.

SOLUTION: strengthener

PROBLEM: Premise: Two people are stick fighting in black Asian style warrior garments.
Hypothesis: A person instructing his student in sword fighting.
Update: One person motions to the other in how to hold and maneuver the sword.

SOLUTION:
strengthener