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 sees PersonZ's friend PersonY
Hypothesis: As a result, PersonX wants to have a good time
Update: They're at a house party
strengthener

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

Premise: PersonX covers PersonY area
Hypothesis: Before, PersonX needed go to PersonY's house
Update: PersonY is agoraphobic and rarely leaves their house.

strengthener