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 boy in a swimsuit walking in the sand towards the water
Hypothesis: A boy in a swimsuit happily walking
Update: The boy laughs as he walks along.

Ex Output:
strengthener


Ex Input:
Premise: A man wearing a jersey with the number 13 on it is ready to bat at a ball while people in the stands look on.
Hypothesis: A man with jersey number 13 is in the middle of a baseball game.
Update: The bat is flattened.

Ex Output:
weakener


Ex Input:
Premise: Fluffy gray dog running in a field
Hypothesis: A puppy is outside.
Update: The dog is chasing butterflies and squirrels.

Ex Output:

strengthener