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 boat is illuminated at night.
Hypothesis: A boat is using the lights to see at night.
Update: There is a tug boat pulling up to the boat with men shining lights in to the boat.

Ex Output:
weakener


Ex Input:
Premise: A brown dog splashing through a puddle on a lawn
Hypothesis: The dog plays in the puddle during the rainstorm.
Update: Its owner took it to the dog park

Ex Output:
strengthener


Ex Input:
Premise: A boy plays tennis.
Hypothesis: A boy is playing his favorite sport.
Update: The boy is wearing a shirt that says 'Soccer Championships Finalist'.

Ex Output:

weakener