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.

Example Input: Premise: A woman with gray hair, a brown hat, sunglasses, and a yellow scarf is looking away from the camera.
Hypothesis: The woman hates having her picture taken.
Update: She's looking in her bag for another hat to model.
Example Output: weakener

Example Input: Premise: A couple kissing on the neck on a busy street.
Hypothesis: The couple is male and female.
Update: The two people kissing are David and Emily.
Example Output: strengthener

Example Input: Premise: A child is riding his bike on a large bridge.
Hypothesis: A kid is learning to ride a bike with family.
Update: The bike has training wheels.
Example Output:
strengthener