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 Input:
Premise: Two girls are standing behind another girl.
Hypothesis: Two girls are preparing to push a third girl.
Update: the third girl is on the top stair

Ex Output:
weakener


Ex Input:
Premise: A street vendor in Asia tries to bring in more customers.
Hypothesis: A salesman selling items to patrons.
Update: The salesman is lowering his prices.

Ex Output:
strengthener


Ex Input:
Premise: A man hanging by a cable from the tower.
Hypothesis: The tower is 12 stories high.
Update: The man looks terrified.

Ex Output:

strengthener