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: Two girls are standing behind another girl.
Hypothesis: Two girls are preparing to push a third girl.
Update: the third girl is on the top stair
[EX A]: weakener

[EX Q]: Premise: A man pushing a cart near the subway.
Hypothesis: The man is selling hotdogs.
Update: Steam comes of of the cart.
[EX A]: strengthener

[EX Q]: Premise: A brown and white dog on a road with its mouth open near a tennis ball
Hypothesis: The tennis ball was yellow.
Update: The tennis ball was completely soaked in the dogs' blood.
[EX A]:
weakener