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. It makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis. It makes you much more likely to believe the hypothesis is true. Your task is to output 'strengthener' or 'weakener' if the update strengths or weakens the hypothesis, respectively.

Ex Input:
Premise: PersonX fixes my car
Hypothesis: PersonX is seen as satisied
Update: X feels skilled.

Ex Output:
strengthener


Ex Input:
Premise: PersonX does PersonY's homework
Hypothesis: PersonX then gets caught by the teacher
Update: PersonX and PersonY are at the library.

Ex Output:
weakener


Ex Input:
Premise: PersonX cooks PersonY
Hypothesis: As a result, PersonX wants to have a nice dinner
Update: X is a cannibal.

Ex Output:
strengthener