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 young boy in red swim shorts playing with sand on a beach.
Hypothesis: A boy is building a sandcastle.
Update: He uses a shovel to dig a moat.
[A]: strengthener


[Q]: Premise: A young african boy skipping rocks.
Hypothesis: There is a rock currently skipping down a pond.
Update: There are several expanding sets of rings on the surface of the pool.
[A]: strengthener


[Q]: Premise: A group of people seated at a picnic table under a tent space decorated with flags and stars.
Hypothesis: The flags and stars are lying on the picnic table.
Update: The table has a clear cover so the decorations will be visible and held in place.
[A]:
strengthener