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: Children climbing an old tree in front of a brick building.
Hypothesis: Children are climbing an old tree in front of the school.
Update: The library in the area has been around for many years.
Example Output: strengthener

Example Input: Premise: An unidentified woman sleeping in a very unusual nook of a decorative stone structure.
Hypothesis: The woman is covered in a blanket.
Update: The woman purchased the blanket from one of the local shops.
Example Output: strengthener

Example Input: Premise: An older gentleman with a gray mustache sitting on a stool in front of a small table in front of a business.
Hypothesis: The old man is the owner of the business, and is waiting for his first customer of the day.
Update: A police officer tells the man to move along
Example Output:
weakener