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 man with green glasses does a trick on his skateboard.
Hypothesis: A man is good on his skateboard.
Update: He is holding the skateboard with his feet.

Output: strengthener


Input: Consider Input: Premise: Two people standing in a curved interior, multi-level building.
Hypothesis: The people are standing in an elevator inside.
Update: People are standing inside curved multi-level building.

Output: weakener


Input: Consider Input: Premise: A woman shoots at target practice.
Hypothesis: A young woman learns to shoot.
Update: She hits the bulls eye.


Output: strengthener