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 moves toward the door
Hypothesis: Before, PersonX needed to turn around
Update: PersonX was heading out of the house.
Example Output: weakener

Example Input: Premise: PersonX opens the back door
Hypothesis: As a result, PersonX feels fit
Update: The air inside was considerably colder
Example Output: strengthener

Example Input: Premise: PersonX takes my family
Hypothesis: Before, PersonX needed to call me
Update: PersonX is a kidnapper.
Example Output:
weakener