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: Two people on bicycles, one is wearing white and black and the other is wearing blue and red.
Hypothesis: Two bicycle riders are racing.
Update: They wear racing bibs with different numbers.

Output: strengthener


Input: Consider Input: Premise: A girls volleyball team practices.
Hypothesis: The volleyball team is preparing for their tournament.
Update: There are no other volleyball teams in the state.

Output: weakener


Input: Consider Input: Premise: A man in plaid with black sunglasses plays on an acoustic guitar.
Hypothesis: A man in sunglasses plays an acoustic guitar for his girlfriend.
Update: A young woman claps for the man.


Output: strengthener