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 biker is racing downhill.
Hypothesis: driving competetion is going on
Update: Police officers on bikes are chasing the person
weakener

Premise: A young boy in a black jacket is running towards a woman with outstretched arms.
Hypothesis: A young boy runs to his mother for a hug.
Update: The boy calls the woman 'Mommy'
strengthener

Premise: A man in a brown coat is wearing a helmet and riding a bicycle while carrying two plastic bags.
Hypothesis: A man carries groceries.
Update: He has just left a supermarket.

strengthener