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: Man with no shirt and woman wearing all black are running in the sand.
Hypothesis: The people are at the beach.
Update: They are running to a cactus.
Example Output: weakener

Example Input: Premise: two men, one with a bicycle, and a woman waiting to cross the road.
Hypothesis: The men are spies.
Update: The men have very high security clearances.
Example Output: strengthener

Example Input: Premise: A woman in a black shirt looks to her right, while a man in a blue vest on her left drinks from a glass.
Hypothesis: The people are in a saloon.
Update: a waitress asks them if they'd like more drinks
Example Output:
strengthener