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 achieves PersonY objective
Hypothesis: Because PersonX wanted to succeed for their boss
Update: PersonX knows achieving the objective means he can leave the company.
Example Output: weakener

Example Input: Premise: PersonX goes swimming in the pool
Hypothesis: PersonX is seen as tired
Update: They swim many laps
Example Output: weakener

Example Input: Premise: PersonX wants to be a nurse
Hypothesis: As a result, PersonX feels supportive
Update: PersonX likes helping people.
Example Output:
strengthener