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 diver swims past a school of colorful fish.
Hypothesis: The diver is a scientist studying fish.
Update: The diver has a camera and notes.
Example Output: strengthener

Example Input: Premise: Side view of a female triathlete during the run.
Hypothesis: A woman winning the triathalon
Update: Someone crossed the finish line just before the woman.
Example Output: weakener

Example Input: Premise: A little girl in a red shirt and purple tights sits surrounded by clothes and holding a book.
Hypothesis: The girl settles down to read after a frantic search for appropriate attire which has left her room a a mess of jumbled clothing.
Update: She opens the book.
Example Output:
strengthener