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 plants an apple tree
Hypothesis: PersonX then personX gets apples for free
Update: PersonX planted the tree in their backyard
Example Output: strengthener

Example Input: Premise: PersonX brings a dish
Hypothesis: Because PersonX wanted to participate in the potluck
Update: PersonX is clearing the table
Example Output: weakener

Example Input: Premise: PersonX puts it there
Hypothesis: As a result, PersonX wants to move something
Update: PersonX decides it doesn't fit.
Example Output:
strengthener