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 old man juggling fire outside a street corner.
Hypothesis: A street performer is juggling.
Update: A man lost his balance and is fumbling items.
Example Output: weakener

Example Input: Premise: A man and women dance together while a crowd looks on on a wooden surface.
Hypothesis: some people's are watching the dance performance made by a man and women
Update: The couple are dancing on the wooden surface.
Example Output: strengthener

Example Input: Premise: A young girl in red bathing suit is in the pool.
Hypothesis: A girl is swimming.
Update: She has taken swimming lessons.
Example Output:
strengthener