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.

[Q]: Premise: A man is performing acrobatics over a group of people kneeling on the ground.
Hypothesis: The acrobat is doing a hard trick.
Update: The acrobat is concentrating very intently.
[A]: strengthener


[Q]: Premise: Two men are sitting with their mouths wide open.
Hypothesis: Two men are having a conversation.
Update: The men are at the dentist.
[A]: weakener


[Q]: Premise: A person playing with a black dog outdoors on a snowy lane with trees in the background and blue skies above.
Hypothesis: Ther person was enjoying some great time with his pet dog out side in the snow
Update: The little boy was so happy that the school was closed today that he immediately started playing with his dog.
[A]:
strengthener