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: Man walking little girl with backpack across street.
Hypothesis: The man is the girl's father.
Update: The man kisses the girl on the cheek.

Ex Output:
strengthener


Ex Input:
Premise: A dog in the snow.
Hypothesis: The puppy is frolicking in the snow.
Update: the dog has been with his owner for many years

Ex Output:
weakener


Ex Input:
Premise: Two people with dark jackets are sitting beside each other.
Hypothesis: Two strangers are sitting next to each other.
Update: The people do not talk.

Ex Output:

strengthener