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 wears out PersonX's welcome
Hypothesis: As a result, PersonX wants to apologize
Update: PersonX wanted to make a good impression
Example Output: strengthener

Example Input: Premise: PersonX takes PersonY to PersonZ
Hypothesis: As a result, PersonX feels generous
Update: PersonX drives for four hours
Example Output: strengthener

Example Input: Premise: PersonX bits PersonX's lip
Hypothesis: Because PersonX wanted to be playful
Update: PersonY is staring at PersonX.
Example Output:
strengthener