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: An African American man smiling.
Hypothesis: The man is showing his teeth to a doctor.
Update: The man is knocking on a door

Output: weakener


Input: Consider Input: Premise: Two women of Asian descent walk beside a city street busy with cars.
Hypothesis: Two women are carrying grocery bags down the street.
Update: They hurry along, each carrying at least two grocery bags in each hand.

Output: strengthener


Input: Consider Input: Premise: A man plays an electric guitar on stage with a pick in his mouth.
Hypothesis: A man is playing a heavy metal song tune on his electric guitar.
Update: The crowd is full of heavy metal fans.


Output: strengthener