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: Two people are on top of the bed of a truck.
Hypothesis: Two guys sit in the bed while the car is in motion.
Update: The driver and his helper are unloading wood onto the ground.
Example Output: weakener

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 woman holding clothes in a park.
Hypothesis: A woman is taking off clothes in the park.
Update: The woman's clothes got soaked with mud.
Example Output:
strengthener