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.

Input: Consider Input: Premise: Older man and woman are in costume on stage during a performance.
Hypothesis: The man and woman are married.
Update: They have a significant age difference

Output: weakener


Input: Consider Input: Premise: A woman is sitting on a chair outdoors with a microphone near her mouth and an instrument on her lap.
Hypothesis: A woman sings into a microphone.
Update: She begins to hum and play her instrument.

Output: strengthener


Input: Consider Input: Premise: A tractor is pulling something down a dirt road with lengths measured in increments of ten meters.
Hypothesis: there is a tractor clearing a path for a building
Update: There is a sign near the path talking about the planned construction of a new library.


Output: strengthener