TASK DEFINITION: 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.
PROBLEM: Premise: A man alone crosscountry skis in the wilderness while wearing a huge backpack.
Hypothesis: A man skis in the wilderness while it's snowing
Update: The fresh powder makes the skiing smooth.

SOLUTION: strengthener

PROBLEM: Premise: A young man in a blue shirt with white shorts volleys a tennis ball.
Hypothesis: A sad man in a blue shirt with white shorts volleys a tennis ball.
Update: He is losing the match.

SOLUTION: strengthener

PROBLEM: Premise: A man providing entertainment on the sidewalk by playing the violin.
Hypothesis: A man is entertaining a crowd by playing classical music on the sidewalk
Update: The man is part of a Metallica cover band.

SOLUTION:
weakener