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.

Premise: A blond little boy is standing by a fence.
Hypothesis: The boy is waiting for his friends to come over.
Update: he is waving to boys walking towards him.
strengthener

Premise: Several people are dividing up painting supplies.
Hypothesis: men and women dividing supplies
Update: Some of the people have breasts, and some have beards.
strengthener

Premise: Two boys are playing in the sand at a playground.
Hypothesis: Two boys are building sandcastles.
Update: The two boys are digging a hole in the sand.

weakener