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. It makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis. It makes you much more likely to believe the hypothesis is true. Your task is to output 'strengthener' or 'weakener' if the update strengths or weakens the hypothesis, respectively.

Example Input: Premise: PersonX eats vegetables
Hypothesis: Because PersonX wanted to satisfy his hunger
Update: PersonX hasn't eaten all day.
Example Output: strengthener

Example Input: Premise: PersonX loves PersonY in return
Hypothesis: Because PersonX wanted to be a lover
Update: PersonX met PersonY on a dating app
Example Output: strengthener

Example Input: Premise: PersonX watches the kids
Hypothesis: As a result, PersonX feels responsible
Update: One of the kids breaks a leg jumping from a tree.
Example Output:
weakener