TASK DEFINITION: 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.
PROBLEM: Premise: PersonX celebrates PersonY 's day
Hypothesis: As a result, PersonX feels selfless
Update: PersonX smashes the cake into PersonY's face.

SOLUTION: weakener

PROBLEM: Premise: PersonX looks after PersonX's children
Hypothesis: Before, PersonX needed to work with his/her spouse
Update: PersonX is divorced.

SOLUTION: weakener

PROBLEM: Premise: PersonX walks PersonY's dogs
Hypothesis: PersonX then pets dogs
Update: PersonX absolutely loves dogs.

SOLUTION:
strengthener