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: Tree boys are skating while one takes pictures and a girl looks on.
Hypothesis: The boys are in a race.
Update: The boys are competing for the affection of the girl.

Ex Output:
strengthener


Ex Input:
Premise: A mama bear and its cub are growling directly at one another.
Hypothesis: A mama bear confronts her cub over food.
Update: There is a piece of meat between the bear and the cub.

Ex Output:
strengthener


Ex Input:
Premise: A black truck and a red car parked on the street in front of a grocery store painted red.
Hypothesis: Some vehicles sit in the parking lot while their owners shop for groceries.
Update: There are people coming out of the grocery store.

Ex Output:

strengthener