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: Multiple people are hanging on to a pole while bystanders observe the event.
Hypothesis: They are acrobats.
Update: The people are in a large tent
Example Output: strengthener

Example Input: Premise: A black and white dog is playing with a large brown cow.
Hypothesis: A dog is let loose on a farm and goes up to a cow wanting to play.
Update: The dog is excited and starts to pet the cow
Example Output: strengthener

Example Input: Premise: Girl with glasses wearing a black horizontally striped shirt, a blue tuque, and jeans sitting on a cobblestone sidewalk and street.
Hypothesis: A girl with glasses is sitting watching the cars go buy outside.
Update: She is drawing cars in a sketchbook
Example Output:
strengthener