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: A lady in a sunhat sitting and reading a book by a body of water.
Hypothesis: A lady is sitting and reading.
Update: The lady has several library cards.
Example Output: strengthener

Example Input: Premise: Birds are fleeing a rock that has recently been splashed by heavy waves.
Hypothesis: Birds are moving away from a wet rock, while its cold outside.
Update: A boat with hunters on it splashed the waves
Example Output: weakener

Example Input: Premise: Two women and a man are standing on a stage with a guitar nearby on the floor.
Hypothesis: They are all musicians.
Update: One woman is wearing an EMT jacket.
Example Output:
weakener