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 makes PersonY evaluation
Hypothesis: PersonX is seen as in control
Update: PersonX is doing a blind evaluation.
Example Output: weakener

Example Input: Premise: PersonX drinks coffee
Hypothesis: Because PersonX wanted to be alert
Update: X has migraine headaches.
Example Output: weakener

Example Input: Premise: PersonX offers PersonY the job
Hypothesis: PersonX then gets thanked
Update: This is PersonY's dream job.
Example Output:
strengthener