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: Several brown dogs playing with a tennis ball in a grassy field.
Hypothesis: dogs playing with a ball they just found
Update: The dog's owner has a photo at home of the dog with the ball.
Example Output: weakener

Example Input: Premise: One person and a dog in a kayak
Hypothesis: A dog and his owner in a yellow kayak on the river.
Update: A man's voice says 'I'm sorry but you can't get in that, it's store policy.'
Example Output:
weakener