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.
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Question: Premise: man in yellow shirt with USA on it sits on chair next to door
Hypothesis: A man near the door is waiting for a friend.
Update: The man is watching the door for hoodlums.

Answer: weakener


Question: Premise: A woman is looking out the window.
Hypothesis: The woman is enjoying the view outside.
Update: The window looks out onto a flower-filled meadow.

Answer: strengthener


Question: Premise: A man on a motorcycle is towing a bicyclist on his bicycle behind him.
Hypothesis: A man on a red motorcycle is towing a bicyclist on a blue bicycle.
Update: The bicyclist's black helmet matches the color of his bike.

Answer:
weakener