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 meets PersonY's friends
Hypothesis: PersonX then is rejected
Update: PersonY's friends invite PersonX to join their club.
Example Output: weakener

Example Input: Premise: PersonX fixes my car
Hypothesis: PersonX is seen as satisied
Update: X feels skilled.
Example Output: strengthener

Example Input: Premise: PersonX closes PersonY's doors
Hypothesis: As a result, PersonX wants to go home
Update: It is very late.
Example Output:
strengthener