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 makes noises
Hypothesis: PersonX then gets annoying
Update: PersonX throws down the flute.
Example Output: strengthener

Example Input: Premise: PersonX sets a trap
Hypothesis: As a result, PersonX feels aggressive
Update: PersonX is a serial murderer
Example Output: strengthener

Example Input: Premise: PersonX gets back to sleep
Hypothesis: PersonX is seen as rested
Update: They have been sleeping for over 8 hours already
Example Output:
strengthener