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 pays enough attention
Hypothesis: PersonX then learns something new
Update: PersonX is learning a new language from his teacher.

Ex Output:
strengthener


Ex Input:
Premise: PersonX needs PersonY help
Hypothesis: As a result, PersonX feels desperate
Update: PersonX is worried.

Ex Output:
strengthener


Ex Input:
Premise: PersonX ensures PersonX's success
Hypothesis: PersonX then personX reaps rewards.
Update: They were the best in their class

Ex Output:
strengthener