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.

[Q]: Premise: PersonX gives tom
Hypothesis: Before, PersonX needed to have something to give
Update: X passes along his knowledge.
[A]: strengthener


[Q]: Premise: PersonX presents PersonY picture
Hypothesis: PersonX then personX gives context
Update: PersonX loves explaining old pictures
[A]: strengthener


[Q]: Premise: PersonX takes flying lessons
Hypothesis: As a result, PersonX feels learner
Update: The flight instructor opened up a whole new avenue of knowledge for PersonX.
[A]:
strengthener