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 rakes over the coals
Hypothesis: PersonX then pours water on coals
Update: PersonX has to put the fire out.
Example Output: strengthener

Example Input: Premise: PersonX keeps PersonY calm
Hypothesis: PersonX is seen as well spirited
Update: PersonX keeps PersonY calm with high doses of Xanax.
Example Output: weakener

Example Input: Premise: PersonX misses PersonX's appointment
Hypothesis: As a result, PersonX feels overbooked
Update: PersonX clears the schedule to make sure the mistake doesn't happen again.
Example Output:
strengthener