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 eats vegetables
Hypothesis: Because PersonX wanted to satisfy his hunger
Update: PersonX hasn't eaten all day.
strengthener

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

Premise: PersonX switches back
Hypothesis: As a result, PersonX feels hesitant
Update: PersonX is invigorated.
weakener