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: Salvation Army members in uniform, one with a musical instrument, stand outside a store in a small group.
Hypothesis: The instrument is a trumpet
Update: One of the members holds a round instrument and sticks.

SOLUTION: weakener

PROBLEM: Premise: A musician is giving a concert to fans.
Hypothesis: they are playing pianos
Update: The musician sits on a stool next to a microphone.

SOLUTION: weakener

PROBLEM: Premise: A teenage boy hits a tennis ball with a racket.
Hypothesis: The boy is on a tennis court.
Update: The balls bounces off a net.

SOLUTION:
strengthener