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 rolls on PersonY's back
Hypothesis: PersonX is seen as in control
Update: PersonY taps out
strengthener

Premise: PersonX changes PersonX's way
Hypothesis: As a result, PersonX feels fit
Update: They enjoyed taking a swim in the pool after jogging in the morning.
strengthener

Premise: PersonX swims upstream
Hypothesis: Before, PersonX needed to drive to the river
Update: PersonX comes from their house, walks to the bank and jumps in.
weakener