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

[EX Q]: Hypothesis: It shows character to step up to an unforeseen challenge.
Update: The challenge is impossible and a losing proposition.
[EX A]: weakener

[EX Q]: Hypothesis: It's good to give back to the community with food drives.
Update: At some point you yourself have used a food drive to feed your family.
[EX A]: strengthener

[EX Q]: Hypothesis: It is customary to tip even pick up orders.
Update: You live in America.
[EX A]:
strengthener