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.

[Q]: 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
[A]: weakener


[Q]: Premise: A flying machine with a yellow sail is landing with industrial buildings in the background.
Hypothesis: The machine is not gas-operated.
Update: The machine has a battery.
[A]: strengthener


[Q]: Premise: A person is waving some sort of light source around while standing on a patch of grass.
Hypothesis: The person signals for help using a light source.
Update: The person is at an outdoor show.
[A]:
weakener