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 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 male Equestrian rider leans forward as his horse stretches out for the 2nd jump of the course, as the crowd looks on with amazement
Hypothesis: A male equestrian rider competes for the championship.
Update: The tournament has just only begun.

A: weakener
****
Q: Premise: A woman drives a bike wearing a white blouse with her brown hair blowing in the wind.
Hypothesis: The woman is riding her bike to conserve fuel use.
Update: A woman is using a gas powered moped.

A:
weakener
****