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 learns to cook
Hypothesis: Then, he knows how to cook
Update: Person X has a culinary degree on his wall.
Example Output: strengthener

Example Input: Premise: PersonX buys a guitar
Hypothesis: PersonX is seen as happy
Update: The guitar came broken
Example Output: weakener

Example Input: Premise: PersonX gives PersonY a ride
Hypothesis: PersonX is seen as happy
Update: PersonX was an uber driver.
Example Output:
strengthener