premise: I had a really good air conditioner.
initial: I never cleaned the filter.
counterfactual: I always cleaned the filter.
original_ending: One day, it stopped working. I got really hot. I regretted having not cleaned the filter.
edited_ending: One day, it stopped working.I got really hot.I regretted having not having it repaired.<SEP>One day, it kept working.I got really cool.I did not regret cleaning the filter.<SEP>One day, it stopped working.I got really hot.I regretted not doing other maintenance.