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: 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.
Example Output: strengthener

Example Input: Premise: Two toddlers sitting in mom's lap.
Hypothesis: Two toddlers are being comforted by their mother after falling off the slide.
Update: The toddlers are laughing.
Example Output: weakener

Example Input: Premise: A motorcyclist in the air with a bike, in a field, with a man behind him.
Hypothesis: A man is on a bike performing tricks.
Update: He hit a rock and is 1 foot off the ground.
Example Output:
weakener