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.

Ex Input:
Premise: A biker is racing downhill.
Hypothesis: driving competetion is going on
Update: Police officers on bikes are chasing the person

Ex Output:
weakener


Ex Input:
Premise: A boy doing a trick in the air on his bicycle
Hypothesis: A boy doing a trick is laughing.
Update: The boy is straight-faced.

Ex Output:
weakener


Ex Input:
Premise: A man who appears to be the band leader is reading from a large white card which he is holding in his left hand, while facing persons holding tubas.
Hypothesis: People are playing tubas.
Update: The players are blowing into the mouth pieces of the tubas.

Ex Output:

strengthener