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, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.
PROBLEM: Premise: Two men ride horses while wielding whips.
Hypothesis: Two men are racing horses.
Update: Two men wield whips as they ride horses pulling plows behind them.

SOLUTION: weakener

PROBLEM: Premise: A brown dog splashing through a puddle on a lawn
Hypothesis: The dog plays in the puddle during the rainstorm.
Update: Its owner took it to the dog park

SOLUTION: strengthener

PROBLEM: Premise: Three girls are riding on a roller coaster.
Hypothesis: three girls scream on a roller coaster
Update: they are afraid of heights.

SOLUTION:
strengthener