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: The black dog is by a soccer ball and the brown dog is running.
Hypothesis: Two dogs are playing together on a soccer field.
Update: The dogs are playing in their backyard.

Output: weakener


Input: Consider Input: Premise: A man is driving a white van sprayed painted with graffiti.
Hypothesis: A man is driving away from some cops.
Update: The man forgot his wallet at work.

Output: weakener


Input: Consider Input: Premise: A mountain biker is riding on a woodland path.
Hypothesis: A mountain biker rides in the sun.
Update: It's a hot and sweltering day.


Output: strengthener