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

Output: strengthener


Input: Consider Input: Premise: PersonX rings PersonY's bell
Hypothesis: As a result, PersonX feels social
Update: PersonX has a gift basket dangling from their arm

Output: strengthener


Input: Consider Input: Premise: PersonX holds PersonY up
Hypothesis: PersonX is seen as relieved
Update: PersonX is sitting next to their elderly parent in the ICU.


Output: weakener