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 starts coughing
Hypothesis: Before, PersonX needed sitting on chair
Update: They had to see the doctor
Example Output: strengthener

Example Input: Premise: PersonX buys a dress
Hypothesis: Because PersonX wanted to be fancy
Update: The dress was only five dollars.
Example Output: weakener

Example Input: Premise: PersonX spills PersonY's soda
Hypothesis: PersonX is seen as embarrassed
Update: PersonX's face goes red and PersonX buys PersonY another soda.
Example Output:
strengthener