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: Man painting over Graffiti in a station.
Hypothesis: The city worker re-paints the subway stations walls.
Update: The sign out front says BP.
Example Output: weakener

Example Input: Premise: Musicians doing with they do best.
Hypothesis: All of the musicians are dressed in black.
Update: The musicians are playing at a party.
Example Output: weakener

Example Input: Premise: If the tide comes in, the man's tennis shoes will get wet.
Hypothesis: The man is collecting clams while the tide is out.
Update: The man's bucket was getting full.
Example Output:
strengthener