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 is best friends
Hypothesis: PersonX then smiles
Update: PersonX's friend hit them.
Example Output: weakener

Example Input: Premise: PersonX listens to PersonY talk
Hypothesis: As a result, PersonX wants to talk back to PersonY
Update: PersonY said they never wanted to hear from them again
Example Output: weakener

Example Input: Premise: PersonX gets PersonY's way
Hypothesis: Before, PersonX needed to know how to disturb him
Update: PersonY does not report to PersonX
Example Output:
strengthener