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: The girl with the blue bucket splashes beneath the pier.
Hypothesis: A girl has sand in her bucket.
Update: The girl's bucket is clean.

SOLUTION: weakener

PROBLEM: Premise: A man is moving a gate that impedes the progress of an oncoming train.
Hypothesis: The railroad worker is completing his last task for the day.
Update: The worker is very tired.

SOLUTION: strengthener

PROBLEM: Premise: A man in a gray jacket is pushing a cart down the road past a bicycle.
Hypothesis: A sad man in a gray jacket is pushing a cart down the road past a bicycle.
Update: His mouth is in a straight line.

SOLUTION:
weakener