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.

Example Input: Premise: PersonX is going to win
Hypothesis: Before, PersonX needed practice
Update: They have been playing for years
Example Output: strengthener

Example Input: Premise: PersonX meets PersonY in person
Hypothesis: Before, PersonX needed talk to persony
Update: PersonX set up the appointment with PersonY.
Example Output: strengthener

Example Input: Premise: PersonX feels happy
Hypothesis: PersonX then sings a song to himself
Update: PersonX is taking a shower
Example Output:
strengthener