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.

Q: Premise: A man wearing a black shirt.
Hypothesis: A man is ready for a wedding
Update: The shirt is sleeveless.

A: weakener
****
Q: 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.

A: strengthener
****
Q: Premise: A foreign family is walking along a dirt path next to the water.
Hypothesis: they are trying not to fall in the water
Update: Their arms are outstretched as an effort to maintain balance.

A:
strengthener
****