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 man with two dogs on a beach
Hypothesis: A man is chasing two dogs on a beach.
Update: The dogs got off of their leashes.
Example Output: strengthener

Example Input: Premise: The sky appears clear.
Hypothesis: The sky looked very clear at night.
Update: Many stars are visible.
Example Output: strengthener

Example Input: Premise: A woman walks in front of a movie advertisement.
Hypothesis: The woman is at a movie theater.
Update: The advertisement is on a billboard.
Example Output:
weakener