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.

Example Input: Premise: Two girls are standing behind another girl.
Hypothesis: Two girls are preparing to push a third girl.
Update: the third girl is on the top stair
Example Output: weakener

Example Input: Premise: a young man jumping a back flip off of a concrete wall.
Hypothesis: The flip is high
Update: The wall is 10 feet tall
Example Output: strengthener

Example Input: Premise: A girl wearing brown jacket smiles.
Hypothesis: There is a girlscout smiling.
Update: The girl has a number of badges on her jacket.
Example Output:
strengthener