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 watches for PersonY opportunity
Hypothesis: Before, PersonX needed keep a vigilant eye out
Update: PersonX has informants who will notify them when a good opportunity comes up.
weakener

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 drives home one night
Hypothesis: PersonX is seen as tired
Update: PersonX's eyelids are getting heavy.

strengthener