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: Four people wearing red, blue, white& black, walking up a white staircase overlooking a marina in an old city.
Hypothesis: The group of people are all part of a party.
Update: They are returning children on Halloween who wore matching costumes while trick or treating.
[EX A]: weakener

[EX Q]: Premise: People walking along a pathway along a lake.
Hypothesis: People may going swimming in the lake.
Update: The people are wearing swimsuits.
[EX A]: strengthener

[EX Q]: Premise: Couple dancing in the center of a circle of spectators.
Hypothesis: A pair of dancers have fun at prom.
Update: The woman is wearing a long white dress and veil.
[EX A]:
weakener