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 takes PersonX's glasses
Hypothesis: As a result, PersonX feels content
Update: PersonX can see better with the glasses.
Example Output: strengthener

Example Input: Premise: PersonX learns how to sing
Hypothesis: As a result, PersonX feels intrigued
Update: They get made fun of for singing
Example Output: weakener

Example Input: Premise: PersonX gets PersonY's tree
Hypothesis: PersonX is seen as satisified
Update: It is a Charlie Brown tree.
Example Output:
weakener