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: People hurrying to get to work in a busy city.
Hypothesis: People waiting at a bus stop.
Update: The people wait on the sidewalk as a bus pulls up by them.

Output: strengthener


Input: Consider Input: Premise: A pipe with one hand on it.
Hypothesis: The pipe is broken.
Update: There is water flowing through the pipe.

Output: weakener


Input: Consider Input: Premise: 2 police officers with helmets on are looking down at something and are riding on horseback.
Hypothesis: Cops giving directions from atop horses.
Update: The police got a call about a suspicious backpack on the sidewalk.


Output: weakener