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 is best friends
Hypothesis: PersonX then smiles
Update: PersonX's friend hit them.
Example Output: weakener

Example Input: Premise: PersonX walks everywhere
Hypothesis: As a result, PersonX wants to save money on gas
Update: They spend too much on gas
Example Output: weakener

Example Input: Premise: PersonX grabs PersonY's stuff
Hypothesis: Because PersonX wanted to have person's possessions
Update: They check the items into a locker and gave PersonY the key.
Example Output:
weakener