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: Two men playing stringed instruments.
Hypothesis: Two guys are preparing for a concert.
Update: They sit in front of their cases in a local park.

SOLUTION: weakener

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 group of people in red shirts playing tug-of-war.
Hypothesis: A group of people in red Star Trek shirts.
Update: The shirts have an Enterprise logo.

SOLUTION:
strengthener