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 performs the heimlich maneuver
Hypothesis: Because PersonX wanted to save the person who is choking
Update: PersonX is scared for the person choking.
Example Output: strengthener

Example Input: Premise: PersonX is an astronaut when PersonY grew up
Hypothesis: PersonX then gets respect
Update: PersonX's mission fails to land on mars/
Example Output: weakener

Example Input: Premise: PersonX learns everything
Hypothesis: Before, PersonX needed attend class hours
Update: PersonX is a genius
Example Output:
weakener