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.

Premise: PersonX tells PersonY's sister
Hypothesis: PersonX is seen as informitive
Update: It is PersonYs birthday
weakener

Premise: PersonX starts a food fight
Hypothesis: As a result, PersonX wants to keep fighting
Update: PersonX is having a ton of fun.
strengthener

Premise: PersonX derives PersonY benefit
Hypothesis: PersonX then makes a friend
Update: They help each other with work

strengthener