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 yellow dog running through a yard covered in leaves while holding a yellow toy in his mouth.
Hypothesis: The dog is playing fetch with a child.
Update: The dog takes the toy to a little kid nearby.

SOLUTION: strengthener

PROBLEM: Premise: Bikini-clad female at the beach doing a cartwheel.
Hypothesis: There is a woman near the water.
Update: Her feet land in the water.

SOLUTION: strengthener

PROBLEM: Premise: A man grilling a hamburger.
Hypothesis: The man is wearing an apron.
Update: The man's clothes are dirty.

SOLUTION:
weakener