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 man and woman walking with their arms around each other.
Hypothesis: A couple is strolling together.
Update: The couple are madly in love.
Example Output: strengthener

Example Input: Premise: An African child attempts a headstand on the front of a boat painted blue and white in water next to a field of crops.
Hypothesis: A child is at a lake.
Update: The name of the boat is The Ocean Fisher
Example Output: weakener

Example Input: Premise: Teachers and students in a classroom.
Hypothesis: A group of teachers are standing in front of a group of students sitting at desks in a classroom.
Update: There are 30 children sitting down and looking at books.
Example Output:
strengthener