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: Two smiling people with dark hair.
Hypothesis: Two people are happy and smiling at a joke.
Update: They are at a comedian's performance.

Output: strengthener


Input: Consider Input: Premise: A man is biting his tongue while throwing some food and attempting to catch it in a frying pan.
Hypothesis: The man is psychotic.
Update: The man is a TV chef known for his unconventional presentation style.

Output: weakener


Input: Consider Input: Premise: A white dog and a brown dog are by a stream.
Hypothesis: Two dogs are sitting by a stream after going for a swim.
Update: The two dogs are wet.


Output: strengthener