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 man in the jacket and tie is being interviewed in a warehouse retail store by the man in blue jeans.
Hypothesis: The man is being interviewed for a management position.
Update: The man has worked in the company for a few years now.

SOLUTION: strengthener

PROBLEM: Premise: A police officer is monitoring a by stander while guarding a building.
Hypothesis: The police officer is a man.
Update: The officer looks stern.

SOLUTION: strengthener

PROBLEM: Premise: A dog jumping through a ring of fire.
Hypothesis: The dog is performing in front of a crowd.
Update: The dog is a circus performer.

SOLUTION:
strengthener