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 goes from bad to worse
Hypothesis: PersonX is seen as sad
Update: They have red puffy eyes
Example Output: strengthener

Example Input: Premise: PersonX tells my wife
Hypothesis: As a result, PersonX feels chatty
Update: PersonX is very tired and grumpy.
Example Output: weakener

Example Input: Premise: PersonX loves horror movies
Hypothesis: Because PersonX wanted to be scared
Update: PersonX screams at the scary movie
Example Output:
strengthener