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.

Input: Consider Input: Premise: Various people out and about in a public place on an autumn day.
Hypothesis: A group of classmates out and about in public on an autumn day.
Update: There is a school bus parked nearby.

Output: strengthener


Input: Consider Input: Premise: two girls sit on a large rock.
Hypothesis: Two sisters pose for a picture on their favorite rock.
Update: The girls are having lunch on a picnic during a vacation in a country they've never seen.

Output: weakener


Input: Consider Input: Premise: A woman in a printed outfit is carrying a tray on her head.
Hypothesis: A woman is learning about balance.
Update: She is standing on one leg and not moving.


Output: strengthener