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 looks up at PersonY
Hypothesis: Because PersonX wanted looks up
Update: PersonY is violently grabbing PersonX's chin.
Example Output: weakener

Example Input: Premise: PersonX takes PersonY on a hike
Hypothesis: PersonX then does a group activity
Update: PersonX is carrying a bag of uniforms
Example Output: strengthener

Example Input: Premise: PersonX turns red
Hypothesis: As a result, PersonX wants go home and sleep
Update: PersonX decides to stay and fight
Example Output:
weakener