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 black and brown dog is running out of the surf.
Hypothesis: A dog is swimming excitedly.
Update: The dog swims with great enthusiasm out of the water.

Answer: strengthener


Question: Premise: A woman is sitting on a man's lap in a chair.
Hypothesis: The man is in love with the woman sitting on his lap.
Update: The woman is the man's wife.

Answer: strengthener


Question: Premise: A man and a woman in with a headscarf and a black apron are leading two horned cattle pulling a trailer down a paved road with trees in the background.
Hypothesis: The people are tired
Update: The people have been working for hours.

Answer:
strengthener