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: You should be fair when tipping a server
Update: You're in a country without tipping at restaurants.
weakener

Hypothesis: It's your choice about who to be friends with.
Update: The person you want to be friends with doesn't like you.
weakener

Hypothesis: It's wrong to ruin someone's birthday.
Update: You have to deliver time-sensitive bad news.

weakener