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: Many people are walking or standing on a busy city sidewalk.
Hypothesis: An angry mob discussing how to storm a building.
Update: They are outside a business that was running a scam and want their money back.
Example Output: strengthener

Example Input: Premise: A man in a tank top looks at a woman near a water sculpture.
Hypothesis: A man thinks a woman is pretty.
Update: The man is smiling.
Example Output: strengthener

Example Input: Premise: A Lay's potato chip truck at the end of a path and two people walking.
Hypothesis: Two people take a walk past an abandoned truck.
Update: A person is getting into the truck
Example Output:
weakener