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: A bright wall painting on the street.
Hypothesis: A mural of a sunset.
Update: The colors are beautiful in red and gold.

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 small group of adults and children are wearing hats and shorts on the sandy beach near the blue water.
Hypothesis: A small group of adults and children are joyously wearing hats
Update: They are making a sand castle.

Ex Output:

strengthener