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 man with a conductors hat sticks his head out the window and leans on the windowsill of the train.
Hypothesis: A man sticks his head out of the window.
Update: The man's hair blows in the wind.

Ex Output:
strengthener


Ex Input:
Premise: A young boy wearing a blue and red jacket is raking leaves.
Hypothesis: A child is doing yardwork with her mother.
Update: The young boy is paid for his services.

Ex Output:
weakener


Ex Input:
Premise: A bunch of people in wheelchairs are pushing one another, while a man takes a picture of them.
Hypothesis: A bunch of people in wheelchairs are pushing one another, while a man takes a picture of them as they compete in a tournament
Update: The people in wheelchairs are going in to a cafeteria.

Ex Output:

weakener