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: 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

Ex Output:
strengthener


Ex Input:
Premise: Three construction workers are standing outside and having a conversation.
Hypothesis: Construction workers are chatting during a break.
Update: The men have meals in their hands.

Ex Output:
strengthener


Ex Input:
Premise: A man wearing a fedora playing a guitar.
Hypothesis: The man is a folk-guitar performer, playing at a local coffee shop.
Update: the man is receiving guitar lessons.

Ex Output:

weakener