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 is helping another man after a fall on the street.
Hypothesis: The man is his brother.
Update: The men look almost identical to each other.
Example Output: strengthener

Example Input: Premise: Military men dressed in camouflage and white aim there weapons while out in the snowy weather.
Hypothesis: men have weapons
Update: They are looking in one direction and reaching for something at their sides.
Example Output: strengthener

Example Input: Premise: A man with a cane and a woman with a yellow scarf walk down a busy paved pedestrian trail with three dogs.
Hypothesis: the woman and man are taking their dogs to the park
Update: The man and woman wear shirts that say Doggy Daycare
Example Output:
weakener