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: Two men, both wearing black outfits with red stripes are engaging in some sort of fighting style using canes.
Hypothesis: They are in a competition
Update: People walk their dogs by them in the park.

SOLUTION: weakener

PROBLEM: Premise: A brown dog chases a blond one in the grass.
Hypothesis: A person watches a one dog chase another.
Update: The blonde dog ran toward the pet door leading into the kitchen.

SOLUTION: weakener

PROBLEM: Premise: Two men are working together to hammer a small sign under a gold frog statue that is on the tree.
Hypothesis: Two men playing with a frog
Update: Two men are putting away the tools.

SOLUTION:
strengthener