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.

Premise: PersonX plays old harry
Hypothesis: As a result, PersonX wants to apologize
Update: PersonX gave old harry a heart attack
strengthener

Premise: PersonX opens the back door
Hypothesis: As a result, PersonX feels fit
Update: The air inside was considerably colder
strengthener

Premise: PersonX forces upon PersonY
Hypothesis: As a result, PersonX wants to defeat PersonY
Update: They are in a mixed martial arts class.

strengthener