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.

Input: Consider Input: Premise: PersonX plays basketball every day
Hypothesis: PersonX is seen as happy
Update: Person X is the best player on the team and screams out loud when he slam dunks.

Output: strengthener


Input: Consider Input: Premise: PersonX wants to learn how to play the guitar
Hypothesis: Before, PersonX needed to find a guitar teacher
Update: PersonX found a great series of tutorials on YouTube.

Output: weakener


Input: Consider Input: Premise: PersonX returns the phone
Hypothesis: As a result, PersonX wants to call the company
Update: The phone has serious issues with it


Output: strengthener