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 rude to criticize a gift that you have been given.
Update: it is a birthday gift
strengthener

Hypothesis: You should try to be happy for your siblings instead of resorting to jealousy
Update: Your parents gave your siblings the entire inheritance
weakener

Hypothesis: You should maintain your friendships with the ones you consider to be a best friend.
Update: They encourage you to engage in good behavior.

strengthener