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.

Ex Input:
Premise: An African American man smiling.
Hypothesis: The man is showing his teeth to a doctor.
Update: The man is knocking on a door

Ex Output:
weakener


Ex Input:
Premise: A yellow dog running through a yard covered in leaves while holding a yellow toy in his mouth.
Hypothesis: The dog is playing fetch with a child.
Update: The dog takes the toy to a little kid nearby.

Ex Output:
strengthener


Ex Input:
Premise: A muzzled race dog running
Hypothesis: A dalmation runs in a dog race.
Update: The dog is skinny

Ex Output:

strengthener