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: Two people on bicycles, one is wearing white and black and the other is wearing blue and red.
Hypothesis: Two bicycle riders are racing.
Update: They wear racing bibs with different numbers.

A: strengthener
****
Q: Premise: A man wearing a black shirt.
Hypothesis: A man is ready for a wedding
Update: The shirt is sleeveless.

A: weakener
****
Q: Premise: A steer throws off a rider while a rodeo clown rushes to his aid.
Hypothesis: A rodeo clown distracts a steer before it can cause further injury to a dismounted rider
Update: The steer headbutts the rider into the dirt and the rider gets up limping.

A:
strengthener
****