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: A man dressed in black playing the trumpet.
Hypothesis: There is a man playing trumpet in a concert.
Update: The man is walking down the street.
Example Output: weakener

Example Input: Premise: A young girl sits on the edge of a sink.
Hypothesis: a girl poses for her mother
Update: The girl's mother is holding a camera.
Example Output: strengthener

Example Input: Premise: Three people are riding horses at a show.
Hypothesis: The horses have brown hair.
Update: The horses hair is the same color as the leather saddle the people are on.
Example Output:
strengthener