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.

Example 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.
Example Output: strengthener

Example Input: Premise: A child standing on stairs is handing a piece of paper to a seated man.
Hypothesis: A child standing on stairs handing a paper to a man sitting down in a chair.
Update: The man is on the ground.
Example Output: weakener

Example Input: Premise: A woman with long hair and an orange sweater hangs a red cloth on a clothesline.
Hypothesis: A woman is hanging a cloth on a clothesline to let it dry.
Update: The red cloth is dusty.
Example Output:
weakener