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 tired
Hypothesis: PersonX is seen as sluggish
Update: PersonX moves very slowly.
Example Output: strengthener

Example Input: Premise: PersonX eats so much
Hypothesis: As a result, PersonX wants to take a stomach medicine
Update: PersonX frequently suffers from heartburn.
Example Output: strengthener

Example Input: Premise: PersonX does n't want to leave
Hypothesis: As a result, PersonX wants stay and enjoy the event
Update: PersonX is having an amazing time.
Example Output:
strengthener