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 in a bright yellow jacket and helmet sits astride a motorcycle chatting with a man in a blue sweatshirt.
Hypothesis: Two men are talking about their bikes.
Update: One of the men points at the other man’s bike
Example Output: strengthener

Example Input: Premise: A man is wearing a green shirt and a welders mask.
Hypothesis: A man is hiding his identity.
Update: He stops every few yards, lifts the face piece while looking all around then returns it and goes a few more yards.
Example Output: strengthener

Example Input: Premise: Inside a bar there are people with red shirts.
Hypothesis: Only the guys in the bar wear red.
Update: Some people in red shirts have long hair
Example Output:
weakener