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: A male taking a nap on a hot afternoon.
Hypothesis: A big human taking a nap.
Update: The man is on a bed that is buckling due to his weight.
Example Output: strengthener

Example Input: Premise: A little boys is enjoying a blue lollipop.
Hypothesis: The boy is wearing a baseball cap.
Update: the boy's hair is visible, blonde and spiky
Example Output: weakener

Example Input: Premise: Two men, one wearing a blue pinstriped shirt, singing karaoke
Hypothesis: The men are laughing between every line.
Update: The men are singing in unbroken harmony.
Example Output:
weakener