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 the cops on PersonY
Hypothesis: Then, they get their concerns met
Update: PersonY was stalking PersonX.
Example Output: strengthener

Example Input: Premise: PersonX persuades PersonY to join
Hypothesis: Before, PersonX needed meet PersonY
Update: PersonX and PersonY have been friends for over 20 years.
Example Output: weakener

Example Input: Premise: PersonX is never seen again
Hypothesis: Before, PersonX needed to leave
Update: PersonX was a transgender atheist in a religious cult
Example Output:
strengthener