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.

Ex Input:
Premise: A lady pushes a stroller, behind a child, riding a tricycle, while another child walks along side.
Hypothesis: A lady is pushing a stroller with a baby inside
Update: As a squirrel runs up a tree, barking is heard from inside the stroller.

Ex Output:
weakener


Ex Input:
Premise: Musicians doing with they do best.
Hypothesis: All of the musicians are dressed in black.
Update: The musicians are playing at a party.

Ex Output:
weakener


Ex Input:
Premise: A man practicing karate moves in the air.
Hypothesis: Little girls are practicing karate
Update: The man is teaching little girls how to defend themselves against bullies.

Ex Output:

strengthener