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 pats PersonY on the head
Hypothesis: PersonX then congratulates
Update: PersonY is very young and PersonX is nurturing.

SOLUTION: strengthener

PROBLEM: Premise: PersonX buys an air purifier
Hypothesis: Because PersonX wanted to shopping
Update: PersonX has trouble breathing at home.

SOLUTION: weakener

PROBLEM: Premise: PersonX washes PersonY's sheets
Hypothesis: PersonX is seen as happy.
Update: PersonX is a mom

SOLUTION:
strengthener