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 gives PersonY a view
Hypothesis: As a result, PersonX feels teacher
Update: PersonY snaps a picture and give PersonX their spot back.
Example Output: weakener

Example Input: Premise: PersonX makes a night of it
Hypothesis: PersonX is seen as tired and satisfied
Update: PersonX wants the party to last all night.
Example Output: weakener

Example Input: Premise: PersonX throws water
Hypothesis: Before, PersonX needed to find it
Update: PersonX is in a desert.
Example Output:
strengthener