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 opens the back door
Hypothesis: As a result, PersonX feels fit
Update: The air inside was considerably colder
Example Output: strengthener

Example Input: Premise: PersonX runs the show
Hypothesis: As a result, PersonX feels aggressive
Update: People are scared of PersonX
Example Output: strengthener

Example Input: Premise: PersonX loves riding PersonX's bike
Hypothesis: PersonX then get ready to have fun
Update: PersonX fell off the bike
Example Output:
weakener