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.

Example Input: Premise: PersonX eats so much
Hypothesis: As a result, PersonX feels glutonous
Update: PersonX has never eaten so much.
Example Output: strengthener

Example Input: Premise: PersonX passes through PersonY's hands
Hypothesis: Before, PersonX needed to be sneaky
Update: PersonY is very vigilant
Example Output: weakener

Example Input: Premise: PersonX checks under PersonY's bed
Hypothesis: As a result, PersonX feels brave
Update: PersonX knows there's nothing under the bed.
Example Output:
weakener