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 accomplishes PersonX's task
Hypothesis: Because PersonX wanted to meet a deadline
Update: PersonX has personal goals only
Example Output: weakener

Example Input: Premise: PersonX goes to the beach with PersonY's friends
Hypothesis: Because PersonX wanted to be social
Update: PersonX was dragged along
Example Output: weakener

Example Input: Premise: PersonX takes a nap instead
Hypothesis: As a result, PersonX feels lazy
Update: PersonX sleeps through their dinner date.
Example Output:
strengthener