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: Two boys playing on a trampoline.
Hypothesis: Two boys playing chess on a trampoline.
Update: There is a checkered board on top of the trampoline.

Output: strengthener


Input: Consider Input: Premise: A woman is sitting on a man's lap in a chair.
Hypothesis: The man is in love with the woman sitting on his lap.
Update: The woman is the man's wife.

Output: strengthener


Input: Consider Input: Premise: a shoe shiner waits for customers.
Hypothesis: A shoe shiner is working hard.
Update: he is talking on his phone


Output: weakener