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 crowded sidewalk in the inner city of an Asian country.
Hypothesis: They are in Shanghai.
Update: the inner city is sprawling with an enormous developed skyline
Example Output: strengthener

Example Input: Premise: A city block is sealed off by the police.
Hypothesis: People can not access the city block.
Update: The block is completely empty and there are policemen guarding barriers around the block.
Example Output: strengthener

Example Input: Premise: a young man wearing a blue striped shirt standing in front of a floral patterened couch
Hypothesis: A young artist gets his picture taken for a magazine as he stands before an upholstered couch.
Update: The man is ugly
Example Output:
weakener