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.

Input: Consider Input: 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.

Output: strengthener


Input: Consider Input: Premise: Sushi bar with giant fish decoration and many customers.
Hypothesis: The customers are there for a special sale.
Update: The restaurant is closing

Output: strengthener


Input: Consider Input: Premise: A family is sitting at a table ready to eat dinner.
Hypothesis: A family is getting ready to eat a feast.
Update: It's Thanksgiving.


Output: strengthener