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: An Asian man performing on a stage.
Hypothesis: A man singing.
Update: The man performs an opera aria.
Example Output: strengthener

Example Input: Premise: Child holding a bamboo object.
Hypothesis: Child holding a long wooden pole.
Update: The object has fishing line tied to the end.
Example Output: strengthener

Example Input: Premise: A girl is walking a horse across a paved suburban street.
Hypothesis: A girl is riding a horse across a paved suburban street.
Update: A girl is on top of a saddled horse.
Example Output:
strengthener