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: A couple kissing on the neck on a busy street.
Hypothesis: The couple is male and female.
Update: The two people kissing are David and Emily.

Output: strengthener


Input: Consider Input: Premise: A boy in a red shirt riding a bike.
Hypothesis: A boy is riding a bike to school.
Update: It is a lovely Sunday afternoon.

Output: weakener


Input: Consider Input: Premise: A girl kicking a stick that a man is holding in tae kwon do class.
Hypothesis: The girl is taking a self-defense class.
Update: She is wearing a student robe.


Output: strengthener