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 bends PersonX's elbow
Hypothesis: Before, PersonX needed to feel pain
Update: PersonX plays tennis.
Example Output: weakener

Example Input: Premise: PersonX fees PersonY's kids
Hypothesis: PersonX is seen as happy
Update: PersonX loves kids
Example Output: strengthener

Example Input: Premise: PersonX screams at PersonY
Hypothesis: Because PersonX wanted to feel powerful
Update: PersonX had a dominant personality
Example Output:
strengthener