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 is playing tennis
Hypothesis: Because PersonX wanted get some exercise
Update: X is trying to lose 10 lbs.
Example Output: strengthener

Example Input: Premise: PersonX cools PersonY
Hypothesis: As a result, PersonX feels friendly
Update: PersonX buries PersonY in the snow.
Example Output:
weakener