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 on a bridge holds a blue object over the rail.
Hypothesis: A sad man on a bridge holds a blue object over the rail.
Update: The man is frowning and looks like he may cry.

A: strengthener
****
Q: Premise: A black man wearing round sunglasses, a colorful shirt, and blue jeans sitting on the ground.
Hypothesis: man on coffee break
Update: The man is eating a sandwich.

A: weakener
****
Q: Premise: An ice cream truck with an open door is driving through a residential neighborhood.
Hypothesis: An ice cream truck with an open door is driving through a big neighborhood.
Update: The ice cream truck is surrounded by several dozen children.

A:
strengthener
****