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 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 child is wearing a white coat while squatting down in front of a person.
Hypothesis: A child is smiling with another person.
Update: The other person is giving the child a toy.
Example Output: strengthener

Example Input: Premise: a young boy wearing a cowboy hat and riding on a horse
Hypothesis: A young boy rides in a rodeo competition.
Update: The boy is surrounded by a lot of trees.
Example Output:
weakener