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 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.
Example Output: strengthener

Example Input: Premise: A boy in the woods.
Hypothesis: There is a boy headed to the woods.
Update: A police dispatcher says 'I see the guy walking towards the dark trees area'
Example Output: strengthener

Example Input: Premise: Two women in orange jump up to block a volleyball shot at a volleyball match.
Hypothesis: Some women are playing in the volleyball championship match.
Update: A sign above the doorway says Opening Night
Example Output:
weakener

