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 young african boy skipping rocks.
Hypothesis: There is a rock currently skipping down a pond.
Update: There are several expanding sets of rings on the surface of the pool.

Answer: strengthener


Question: Premise: A man is kicking another man in the head inside of a red ring while another man watches.
Hypothesis: Tall humans kicking
Update: The men are over 6 feet tall.

Answer: strengthener


Question: Premise: Two men, sitting on ambulance motorcycles, are talking to each other.
Hypothesis: Two men in uniform are sitting on ambulance motorcycles talking to each other.
Update: The men did not have time to change into there uniforms so they are in plain clothes.

Answer:
weakener