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: A group of people appear to be tilling the ground in front of a couple of thatch roof huts.
Hypothesis: The people are going to plant a garden.
Update: But they are actually making a place for the water to run off when it rains.
[A]: weakener


[Q]: Premise: A group of black boys in a classroom setting wearing white shirts, listening to a speech about UNICEF.
Hypothesis: A group of high school students hear about the advantages of donating to UNICEF.
Update: The boys' teacher used to work for UNICEF.
[A]: strengthener


[Q]: Premise: Trees obscure a building to the right.
Hypothesis: There are trees near that building.
Update: The shadow of the trees doesn't reach the building.
[A]:
weakener