TASK DEFINITION: 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.
PROBLEM: Premise: Two dogs on leashes straining toward each other while their owners walk away from each other.
Hypothesis: The dogs hate eachother.
Update: The two male dogs are very aggressive towards each other.

SOLUTION: strengthener

PROBLEM: Premise: This is a man walking near a busy street.
Hypothesis: The man is walking because they don't have a car.
Update: The man is walking to increase the number of steps monitored by his activity device.

SOLUTION: weakener

PROBLEM: Premise: A dog trotting down the beach with a toy in its mouth.
Hypothesis: The dog that is here is a Labrador.
Update: The dog has a shiny black coat

SOLUTION:
strengthener