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 gets food poisoning
Hypothesis: As a result, PersonX feels weak
Update: They have a strong stomach

Output: weakener


Input: Consider Input: Premise: PersonX eats burgers
Hypothesis: PersonX then mouth gets dirty
Update: X brushes his teeth.

Output: strengthener


Input: Consider Input: Premise: PersonX learns to skateboard
Hypothesis: Before, PersonX needed pay for a skateboard class
Update: PersonX has never used a skateboard before.


Output: strengthener