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 in a beige shirt is operating a video camera next to a girl in a black sweater.
Hypothesis: The video camera is pointed at the girl.
Update: Two trapeze artists are putting on a show.
Example Output: weakener

Example Input: Premise: Man painting over Graffiti in a station.
Hypothesis: The city worker re-paints the subway stations walls.
Update: The sign out front says BP.
Example Output: weakener

Example Input: Premise: Two friends are smiling and wearing large sombreros.
Hypothesis: Two friend are wearing hats they just bought.
Update: They are at a costume store.
Example Output:
strengthener