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.

Input: Consider Input: Premise: Lecture takes place in casual atmosphere.
Hypothesis: The lecture is lengthy.
Update: Most people had packed a lunch.

Output: strengthener


Input: Consider 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.

Output: strengthener


Input: Consider Input: Premise: A white dog is watching a black dog jump on a lawn next to a pile of large rocks.
Hypothesis: A dog might be watching another dog play in the yard.
Update: The dogs have different owners.


Output: strengthener