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.

Example Input: Premise: Large group of people marching for some cause.
Hypothesis: A crowd is protesting.
Update: The crowd have breast cancer fund raising shirts.
Example Output: weakener

Example Input: Premise: a dog jumps into the pond.
Hypothesis: A dog jumps to get his ball.
Update: The dog likes to swim
Example Output: weakener

Example Input: Premise: Four children in uniforms stand in front of palm trees.
Hypothesis: A group of children in school uniforms pose for a picture by palm trees
Update: The children are all looking at a man with a camera on a tripod pointed at them.
Example Output:
strengthener