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: Two girls in red and blowing bubbles with gum.
Hypothesis: One child has challenged another to blow the biggest bubble.
Update: The girls are carefully controlling their breathing to make the bubbles bigger.
Example Output: strengthener

Example Input: Premise: 3 men cooking in a small kitchen.
Hypothesis: Three men are around the stove.
Update: One of the men says he can smell something burning.
Example Output: strengthener

Example Input: Premise: A young boy wearing a green and red shirt kneels down on a sidewalk in Paris.
Hypothesis: The boy is from Paris.
Update: The boy knows his way around the city.
Example Output:
strengthener