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 closes it behind PersonY
Hypothesis: Before, PersonX needed to grab what needs to be closed.
Update: PersonX used the door handle.
Example Output: strengthener

Example Input: Premise: PersonX buys a cake
Hypothesis: Before, PersonX needed to go to shop
Update: PersonX sits in front of a computer
Example Output: weakener

Example Input: Premise: PersonX swims at the local pool
Hypothesis: As a result, PersonX wants to change their clothes
Update: PersonX is going to tan outside after
Example Output:
weakener