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 is good to acknowledge when people change for the better.
Update: Acknowledging the change encourages them to keep improving.
strengthener

Hypothesis: It's understandable to be upset if your significant other doesn't buy you a Christmas gift.
Update: You're both unemployed and your budget is extremely tight.
weakener

Hypothesis: It's presumptuous to tell someone else who they're allowed to host overnight.
Update: they are not related to you.

strengthener