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 boy in a swimsuit walking in the sand towards the water
Hypothesis: A boy in a swimsuit happily walking
Update: The boy laughs as he walks along.

Answer: strengthener


Question: Premise: A dog in a sandy area with the sand stirred up into the air and several plants in the background.
Hypothesis: The dog is a Great Dane.
Update: Someone is overheard saying 'Wow he's huge!'

Answer: strengthener


Question: Premise: In the autumn, two men run in opposite directions down a path that leads over a bridge and through the woods, while two others walking a dog are stopped on the bridge.
Hypothesis: Two people with dogs are stopped on a bridge because they're tired.
Update: They lean on railing breathing hard.

Answer:
strengthener