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: Cheerleaders are performing on a football field.
Hypothesis: Cheerleaders are performing on AstroTurf.
Update: Two of the cheerleaders have rug burns on their knees from the AstroTurf.

A: strengthener
****
Q: Premise: A woman with red-hair and a black hat is standing in front of pictures.
Hypothesis: The woman wearing the black hat has red hair.
Update: The woman dyes her hair.

A: weakener
****
Q: Premise: One man checks out a bicycle in a shop while another sits nearby.
Hypothesis: The man is wearing shorts.
Update: The man is dressed for a BMX race.

A:
strengthener
****