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.

[EX Q]: 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.
[EX A]: strengthener

[EX Q]: Premise: A boat is illuminated at night.
Hypothesis: A boat is using the lights to see at night.
Update: There is a tug boat pulling up to the boat with men shining lights in to the boat.
[EX A]: weakener

[EX Q]: Premise: A man walking down the street with his hands in his pocket, and an elderly woman stands near a staircase with her hand on her purse.
Hypothesis: An old woman is afraid some guy will take her purse.
Update: She's heard news of a purse snatcher recently.
[EX A]:
strengthener