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: An icy, snowy city street with a bike resting against a pole.
Hypothesis: The bike is covered in snow.
Update: There are fresh tire track behind the bike.
[A]: weakener


[Q]: Premise: A child is window shopping for a brown purse.
Hypothesis: A child is shopping to complete their outfit
Update: Tomorrow is her mother's birthday.
[A]: weakener


[Q]: Premise: A group of young girls hold hands while wearing colorful skirts while other women dance and smile around them with two men discussing something in the background.
Hypothesis: The girls are friends.
Update: The girls introduce themselves to each other.
[A]:
weakener