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 pipe with one hand on it.
Hypothesis: The pipe is broken.
Update: There is water flowing through the pipe.
Example Output: weakener

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: a man in a subway playing an instrument.
Hypothesis: A man is playing the tuba for the people.
Update: The man has an important recital in an hour.
Example Output:
weakener