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 calls my parents
Hypothesis: As a result, PersonX wants to talk
Update: PersonX has important news
Example Output: strengthener

Example Input: Premise: PersonX lets PersonX's cat
Hypothesis: As a result, PersonX wants to feed their cat
Update: The cat's vet said it needs to go on a diet
Example Output: weakener

Example Input: Premise: PersonX helps PersonY's family
Hypothesis: Before, PersonX needed to know PersonY.
Update: PersonX and PersonY are in the same grade at the same school.
Example Output:
strengthener