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 wearing sunglasses, a cap, and a blue shirt with a Superman logo on it is walking on the sidewalk holding a stereo.
Hypothesis: The stereo that the man is holding is large.
Update: Some onlookers ask him 'You need help with that?'
Example Output: strengthener

Example Input: Premise: A man in an orange vest is working on a train.
Hypothesis: The train will head to Vermont once fixed.
Update: The man is from the midwest.
Example Output: weakener

Example Input: Premise: A white dog with a branch in his mouth and a black dog.
Hypothesis: Two dogs are barking.
Update: The dogs are busy chewing.
Example Output:
weakener