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 Q]: Premise: A man on a motorcycle is towing a bicyclist on his bicycle behind him.
Hypothesis: A man on a red motorcycle is towing a bicyclist on a blue bicycle.
Update: The bicyclist's black helmet matches the color of his bike.
[EX A]: weakener

[EX Q]: Premise: A young boy wearing a black t-shirt, holding a green baby lizard.
Hypothesis: a boy holding a lizard  that he just found
Update: The boy is in the desert.
[EX A]: strengthener

[EX Q]: Premise: The people driving the tiny white car were nearly hit by the train, but it had fortunately stopped just in time.
Hypothesis: The tiny white car with the Obama bumper sticker was almost hit by the train, however, the car managed to barely avoid the collision.
Update: The car's windows are shattered.
[EX A]:
weakener