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 eats better
Hypothesis: Because PersonX wanted to be healthier
Update: Person X is on a diet.
Example Output: strengthener

Example Input: Premise: PersonX goes to PersonY's house
Hypothesis: PersonX is seen as accomplished
Update: Their friend is a bad person
Example Output: weakener

Example Input: Premise: PersonX wants to get rid of PersonY
Hypothesis: PersonX is seen as satisfied
Update: PersonX is sick of PersonY's behavior.
Example Output:
strengthener