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.

Premise: A black man wearing round sunglasses, a colorful shirt, and blue jeans sitting on the ground.
Hypothesis: man on coffee break
Update: The man is eating a sandwich.
weakener

Premise: A kid on a surfboard riding a small wave.
Hypothesis: A kid on a surfboard riding a wave for a competition.
Update: The kid is being cheered on by a large crowd.
strengthener

Premise: Several people walking past a food cart on a city street.
Hypothesis: Dozens of people walk past a smelly lunch truck.
Update: The lunch truck serves salads.

weakener