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 moves back
Hypothesis: PersonX then personX smiles
Update: PersonX always loved their hometown.
Example Output: strengthener

Example Input: Premise: PersonX takes a nap
Hypothesis: Before, PersonX needed to have eaten a lot
Update: PersonX did a lot of yardwork.
Example Output: weakener

Example Input: Premise: PersonX crosses the aisle
Hypothesis: Because PersonX wanted to be a peace maker
Update: PersonX sits near the middle of the congress chamber
Example Output:
strengthener