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 person in a blue tank top climbing a rock.
Hypothesis: A woman is rock climbing.
Update: The person has painted fingernails.
Example Output: strengthener

Example Input: Premise: One man is sleeping, the other is jumping on his bed, both are wearing white and look to be on Indian descent.
Hypothesis: The men are brothers who share a bedroom.
Update: The men are in a house owned by people they're both related to.
Example Output: strengthener

Example Input: Premise: Third-world girl in hammock.
Hypothesis: Third-world girl watches the sun set in her hammock.
Update: The girl is hungry for dinner.
Example Output:
strengthener