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 has to take PersonY to the doctor
Hypothesis: As a result, PersonX wants to meet the doctor
Update: They have an emergency
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 buys the bike
Hypothesis: PersonX then loses money
Update: The bike isn't built to last.
Example Output:
strengthener