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: Two women stand in the foreground making foolish faces in front of a diverse crowd of young people.
Hypothesis: Two teachers are making funny faces at their students.
Update: The people are in a classroom.
Example Output: strengthener

Example Input: Premise: A woman concentrates on the device in her hand in the midst of a crowded establishment all lit in purple.
Hypothesis: a woman doing work in a crowd
Update: A woman wears a security jacket.
Example Output: strengthener

Example Input: Premise: A barefooted woman in a white tank and blue shorts puts her feet in the water spray.
Hypothesis: A lady sits by a fountain.
Update: She sits at the edge of a pool.
Example Output:
weakener