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

Hypothesis: It's expected to get a lot of gifts on a birthday.
Update: You are an adult and don't celebrate it.
weakener

Hypothesis: It's fine to want to avoid a dangerous situation
Update: You have a serious heart condition.
strengthener

Hypothesis: You shouldn't treat pets as possessions.
Update: The pets are working animals that provide required assistance.

strengthener