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 lives with PersonX's father
Hypothesis: As a result, PersonX feels a child
Update: PersonX's father needs a caretaker.
Example Output: weakener

Example Input: Premise: PersonX lives at home
Hypothesis: As a result, PersonX feels fixed
Update: PersonX bought their home with their own money
Example Output: weakener

Example Input: Premise: PersonX lands on PersonX's hand
Hypothesis: PersonX is seen as hurt
Update: The sledgehammer was very heavy.
Example Output:
strengthener