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: Woman and young lady sit on the sidewalk while young man plays flute in background.
Hypothesis: The man is secretly a Russian spy watching the womens' every move.
Update: He surreptitiously snaps a photo.

SOLUTION: strengthener

PROBLEM: Premise: A man with green glasses does a trick on his skateboard.
Hypothesis: A man is good on his skateboard.
Update: He is holding the skateboard with his feet.

SOLUTION: strengthener

PROBLEM: Premise: Several older people stand near a ladder while wearing costumes.
Hypothesis: The clowns determine whether they can all stand at the top of the ladder together.
Update: The ladder is leaning against a roof.

SOLUTION:
weakener