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: A group of chefs are cooking at a barbecue restaurant.
Hypothesis: Chefs cooking steak at a barbecue restaurant.
Update: The main dish on the menu is filet mignon.

SOLUTION: strengthener

PROBLEM: Premise: A crowded sidewalk in the inner city of an Asian country.
Hypothesis: They are in Shanghai.
Update: the inner city is sprawling with an enormous developed skyline

SOLUTION: strengthener

PROBLEM: Premise: A man with green glasses does a trick on his skateboard.
Hypothesis: A man is good on his skateboard.
Update: The is about to hit him in the head.

SOLUTION:
weakener