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: Two smiling people with dark hair.
Hypothesis: Two people are happy and smiling at a joke.
Update: They are at a comedian's performance.

Ex Output:
strengthener


Ex Input:
Premise: A man with glasses is holding a very young infant.
Hypothesis: a man holds his niece
Update: They live in the same house.

Ex Output:
weakener


Ex Input:
Premise: Three people sitting at a table outside Bar Gelati Tabacchi.
Hypothesis: Three people are enjoying drinks after work.
Update: One of the three people are celebrating their birthday.

Ex Output:

weakener