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 man is standing on a small floating raft with a flag.
Hypothesis: The man is a survivor of a shipwreck.
Update: He has supplies with him

Ex Output:
strengthener


Ex Input:
Premise: Brown dog walks through river between snowbanks.
Hypothesis: The dog is feeling cold.
Update: He shivers as he walks through the icy water.

Ex Output:

strengthener