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.

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

Output: weakener


Input: Consider Input: Premise: PersonX climbs the mountain
Hypothesis: As a result, PersonX feels strong
Update: PersonX jumps for joy

Output: strengthener


Input: Consider Input: Premise: PersonX returns the dog
Hypothesis: Because PersonX wanted to give the pet back to their owner
Update: PersonX was being paid to watch their friend's dog.


Output: weakener