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: 3 team members, wearing 3 uniforms, are jumping towards the volleyball nets to block an opposing teams, wearing a yellow uniforms, spike.
Hypothesis: they are playing volleyball for the championship
Update: The teams are playing more intensely than they have before.
Example Output: strengthener

Example Input: Premise: Children are rollerblading in a courtyard.
Hypothesis: Children are rollerblading in a courtyard on their way to the field.
Update: One child had a football in her hand.
Example Output:
strengthener