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 wants to fly
Hypothesis: Because PersonX wanted to be in the sky
Update: PersonX is a bird otherkin
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 is walking in the woods
Hypothesis: As a result, PersonX wants to go home
Update: PersonX is barefoot and lost
Example Output:
strengthener