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 gets PersonY's lunch
Hypothesis: PersonX is seen as good about themselves
Update: PersonY eats every bite of the sandwich.
Example Output: strengthener

Example Input: Premise: PersonX follows PersonY closely
Hypothesis: Because PersonX wanted to learn form the best
Update: PersonY is training PersonX
Example Output: strengthener

Example Input: Premise: PersonX buys PersonX's new shoes
Hypothesis: PersonX is seen as comfortable
Update: PersonX buys stiletto heels.
Example Output:
weakener