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 celebrates PersonY 's day
Hypothesis: As a result, PersonX feels selfless
Update: PersonX smashes the cake into PersonY's face.
Example Output: weakener

Example Input: Premise: PersonX calls my parents
Hypothesis: As a result, PersonX wants to talk
Update: PersonX has important news
Example Output: strengthener

Example Input: Premise: PersonX raises it to PersonX's lips
Hypothesis: Before, PersonX needed to pick up something
Update: He brushes her fingertips.
Example Output:
strengthener