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: 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: A group of children that are either sitting or standing in a line, while two are holding a round object.
Hypothesis: the children play a game
Update: the children are on a field trip
Example Output: weakener

Example Input: Premise: A group of people sit on a lawn while one plays a guitar.
Hypothesis: The group of people are listening to one play the guitar.
Update: They are sitting in a circle and singing.
Example Output:
strengthener