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.

Example Input: Premise: A young girl does a handstand on a bed with blue sheets.
Hypothesis: A girl is practicing gymnastics on her bed.
Update: The girl has a headstand video up on YouTube that she is copying
Example Output: strengthener

Example Input: Premise: Bikini-clad female at the beach doing a cartwheel.
Hypothesis: There is a woman near the water.
Update: Her feet land in the water.
Example Output: strengthener

Example Input: Premise: A man with a red shirt and black hat suspends himself in the air by sitting on a pole and clinging to two wires with his hands.
Hypothesis: A man in a circus sits on a pole and prepares to swing from some wires while wearing his costume.
Update: The man works as an exotic dancer.
Example Output:
weakener