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 dog in a sandy area with the sand stirred up into the air and several plants in the background.
Hypothesis: The dog is a Great Dane.
Update: Someone is overheard saying 'Wow he's huge!'
Example Output: strengthener

Example Input: Premise: Woman in Jacket with hood up walks alone down crowded street.
Hypothesis: The lady is preparing to walk in a bank where she will steal the pen they let you borrow to sign checks.
Update: The woman finds a pen on the ground.
Example Output: weakener

Example Input: Premise: A group of people are sight seeing and taking pictures.
Hypothesis: the group is on vacation
Update: The people wear casual clothing and carry maps and cameras.
Example Output:
strengthener