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 introduces PersonY
Hypothesis: Before, PersonX needed to know PersonY's name
Update: PersonX is introducing PersonY from memory.

Output: strengthener


Input: Consider Input: Premise: PersonX demands PersonY explanation
Hypothesis: As a result, PersonX feels leader
Update: PersonX just got a promotion

Output: strengthener


Input: Consider Input: Premise: PersonX raises PersonX's kids
Hypothesis: Then, they develop empty net syndrome
Update: PersonX’s children are off at college out of state.


Output: strengthener