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: Two men wearing sunglasses and walking outside.
Hypothesis: The two men are siblings.
Update: The men have different parents.
[A]: weakener


[Q]: Premise: A crowd of people are holding signs and protesting against school cuts.
Hypothesis: A crowd of people chanting.
Update: A crowd of students and teachers chanting, "No layoffs."
[A]: strengthener


[Q]: Premise: A man in an orange vest is working on a train.
Hypothesis: The train will head to Vermont once fixed.
Update: The train is in Australia.
[A]:
weakener