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.
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Question: Premise: PersonX knows PersonX's value
Hypothesis: PersonX is seen as happy
Update: PersonX smiles joyously

Answer: strengthener


Question: Premise: PersonX gives PersonY warning
Hypothesis: Because PersonX wanted to do something nice
Update: PersonX is trying to keep PersonY from getting into trouble.

Answer: strengthener


Question: Premise: PersonX moves back
Hypothesis: PersonX then personX smiles
Update: PersonX always loved their hometown.

Answer:
strengthener