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.

Q: Premise: PersonX celebrates PersonY 's day
Hypothesis: Because PersonX wanted make person y happy
Update: They want them to return a favor

A: weakener
****
Q: Premise: PersonX helps PersonY learn
Hypothesis: Before, PersonX needed have knowledge
Update: PersonX is a certified teacher.

A: strengthener
****
Q: Premise: PersonX sings PersonX's heart out
Hypothesis: Before, PersonX needed to be in key
Update: Person X is singing on stage.

A:
strengthener
****