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

A: weakener
****
Q: Premise: People gathered outside a building in the dark.
Hypothesis: people are gathered outside a building because it's a night time fire drill.
Update: An ear-splitting alarm is going off.

A: strengthener
****
Q: Premise: A bald man with glasses wearing a gray long-sleeve sweater and jeans has his left hand up towards his mouth.
Hypothesis: A tall human holds his hand up
Update: The bald man is combing the sides of his head

A:
weakener
****