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 young man in a blue shirt with white shorts volleys a tennis ball.
Hypothesis: A sad man in a blue shirt with white shorts volleys a tennis ball.
Update: He is losing the match.
Example Output: strengthener

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 black shirt sitting at a restaurant table texting.
Hypothesis: A man sits at a table and texts his late date.
Update: the man drinks water while texting and there's another placemat setup across from him
Example Output:
strengthener