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 helps PersonY learn
Hypothesis: Before, PersonX needed have knowledge
Update: PersonX is a certified teacher.

Answer: strengthener


Question: Premise: PersonX uploads the video
Hypothesis: Because PersonX wanted to gain many youtube subscribers
Update: PersonX doesn't have any other career plans.

Answer: strengthener


Question: Premise: PersonX knocks PersonY out
Hypothesis: PersonX then is pumped
Update: PersonX and PersonY are competing in a boxing match.

Answer:
strengthener