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: 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: The sky appears clear.
Hypothesis: The sky looked very clear at night.
Update: Many stars are visible.

Ex Output:
strengthener


Ex Input:
Premise: A man is diving into water on a slightly cloudy day.
Hypothesis: The man is diving into a lake.
Update: The man is on a diving board.

Ex Output:

weakener