In this task, you are given a hypothesis and an update. The hypothesis sentence is a statement that speaks of a socially normative behavior. In other words, it is a generalizing statement about how we expect people to behave in society. The update provides additional contexts about the situation that might UNDERMINE or SUPPORT the generalization. An undermining context provides a situation that weakens the hypothesis. A supporting context provides a situation that strengthens the generalization. Your task is to output 'strengthener' or 'weakener' if the update supports or undermines the hypothesis, respectively

Example Input: Hypothesis: It's understandable to want to avoid greeting people.
Update: Unless it's your wedding.
Example Output: weakener

Example Input: Hypothesis: It is OK to ask your housemate's guest to bring the spare keys back home after he locked your guest outside.
Update: The guest has no jacket on and it is freezing.
Example Output: strengthener

Example Input: Hypothesis: It's good for the environment to reuse towels.
Update: they are washed regularly.
Example Output:
strengthener