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 achieves PersonY objective
Hypothesis: Because PersonX wanted to succeed for their boss
Update: PersonX knows achieving the objective means he can leave the company.
Example Output: weakener

Example Input: Premise: PersonX wants a new hairstyle
Hypothesis: As a result, PersonX feels openminded
Update: PersonX wants a new look.
Example Output: strengthener

Example Input: Premise: PersonX says would prefer
Hypothesis: PersonX then gets first choice
Update: PersonX pulled the longest straw.
Example Output:
strengthener