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 man wearing a black jacket and white shirt is talking to a woman at a bar.
Hypothesis: A man is talking to a woman he would like to date at a bar.
Update: The man is touching the woman’s arm
Example Output: strengthener

Example Input: Premise: The man is driving his equipment under the archway.
Hypothesis: The sad man is driving his equipment under the archway.
Update: The man just got a promotion at work.
Example Output: weakener

Example Input: Premise: A group of motocross racers lined up to start.
Hypothesis: A group of motocross racers are sharing a cigarette.
Update: Loud engines can be heard.
Example Output:
weakener