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.

Ex Input:
Premise: Two blond women are smiling while one is holding a camera to capture their image.
Hypothesis: Two women taking a selfie on the beach.
Update: The women are wearing bikinis.

Ex Output:
strengthener


Ex Input:
Premise: Nine women in blue and purple dresses and one man wearing a purple shirt and black pants, clap while a man dressed in black dances.
Hypothesis: There is a group watching a street performance.
Update: The man in black dances underneath a street sign as people watch from the sidewalk.

Ex Output:
strengthener


Ex Input:
Premise: A woman teaching a young girl not to be afraid of puppies.
Hypothesis: The instructor taught the girl to approach the four-legged animals.
Update: The girl knew to walk slowly.

Ex Output:

strengthener