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 skydiver in a yellow parachute prepares for landing.
Hypothesis: A skydiver is sweating from nerves.
Update: The skydiver's face and hair are wet.
Example Output: strengthener

Example Input: Premise: Three asian girls and one asian guy sitting in front of a volcano project
Hypothesis: Three fat asian girls and one asian guy sitting in front of a volcano project
Update: They're sitting with Doritos and Mtn. Dew
Example Output: strengthener

Example Input: Premise: Two people standing in front of a yellow building with a painted mural of an athlete, a rock group, and graffiti.
Hypothesis: A couple stands outside of an arena, wating for a concert to start.
Update: A couple stands outside of an arena, waiting for Taylor Swift performance.
Example Output:
strengthener