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 is great friends
Hypothesis: PersonX is seen as happy
Update: Person X is smiling big and laughing a lot.

Output: strengthener


Input: Consider Input: Premise: PersonX greets PersonY
Hypothesis: PersonX is seen as glad
Update: PersonY looks angrily at PersonX.

Output: weakener


Input: Consider Input: Premise: PersonX turns the boat
Hypothesis: Before, PersonX needed grab onto the wheel
Update: A rapids was ahead of the boat.


Output: strengthener