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.
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Question: Premise: A man in a baseball cap playing a black acoustic guitar.
Hypothesis: A male musician in a baseball cap playing on his black acoustic guitar as other give him money on a street corner.
Update: Passersby clapped enthusiastically as the music continued and then placed dollar bills in his open guitar case on the sidewalk.

Answer: strengthener


Question: Premise: The black dog is by a soccer ball and the brown dog is running.
Hypothesis: Two dogs are playing together on a soccer field.
Update: The dogs are playing in their backyard.

Answer: weakener


Question: Premise: A grandfather, father and grandson gather in the family kitchen for a birthday celebration.
Hypothesis: The men of the family celebrate Grandpa's birthday alone.
Update: A text shows up on a phone from a wife that says “why didn’t we get invited?”

Answer:
strengthener