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: Two men are climbing up a steep rock face with moss growing out of it.
Hypothesis: Two men are climbing up a steep rock face to meet someone.
Update: They are leading the way in a rock climbing competition.

Ex Output:
weakener


Ex Input:
Premise: A boy doing a trick in the air on his bicycle
Hypothesis: A boy doing a trick is laughing.
Update: The boy is straight-faced.

Ex Output:
weakener


Ex Input:
Premise: A terrier chasing a red ball.
Hypothesis: The dog is black.
Update: The dog is covered in mud.

Ex Output:

weakener