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 man with a conductors hat sticks his head out the window and leans on the windowsill of the train.
Hypothesis: A man sticks his head out of the window.
Update: The man's hair blows in the wind.

A: strengthener
****
Q: Premise: A man wearing a suit walks next to a building support column with palm trees in the background.
Hypothesis: a man is late for work
Update: He is happy to be on vacation.

A: weakener
****
Q: Premise: A businessman leaving early for the day.
Hypothesis: The businessman is driving.
Update: The businessman recently bought a Mercedes.

A:
strengthener
****