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 female student concentrates on her schoolwork.
Hypothesis: A student is at school working on her schoolwork.
Update: The library is very quiet and a good place for her to finish her assignment.

Output: strengthener


Input: Consider Input: Premise: The man in the jacket and tie is being interviewed in a warehouse retail store by the man in blue jeans.
Hypothesis: The man is being interviewed for a management position.
Update: The man has worked in the company for a few years now.

Output: strengthener


Input: Consider Input: Premise: A dog jumps for a yellow and black ball.
Hypothesis: The dog weighs 20 pounds.
Update: the dog is a Pomeranian


Output: strengthener