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 losing money
Hypothesis: As a result, PersonX wants cut down his expenses
Update: PersonX bought new equipment.
Example Output: weakener

Example Input: Premise: PersonX is on PersonY's way back
Hypothesis: Because PersonX wanted help person find the way home
Update: It's dark out
Example Output:
strengthener