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 visits mexico
Hypothesis: PersonX then flies back home
Update: PersonX bought plane tickets there.
Example Output: strengthener

Example Input: Premise: PersonX goes shopping at the mall
Hypothesis: PersonX then spends too much money
Update: PersonX only gets a few items that they really need.
Example Output: weakener

Example Input: Premise: PersonX breaks my arm
Hypothesis: As a result, PersonX feels injured
Update: Person X screams out loud in pain.
Example Output:
strengthener