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: Two people on bicycles, one is wearing white and black and the other is wearing blue and red.
Hypothesis: Two bicycle riders are racing.
Update: They wear racing bibs with different numbers.

Output: strengthener


Input: Consider Input: Premise: A man with green glasses does a trick on his skateboard.
Hypothesis: A man is good on his skateboard.
Update: He is holding the skateboard with his feet.

Output: strengthener


Input: Consider Input: Premise: The skateboarder rides near a small cone.
Hypothesis: The skateboarder rides his skateboard on the concrete.
Update: The skateboarder's town is known for its wooden sidewalks.


Output: weakener