premise: Laura has always loves swimming, but she has never tried backstroke.
initial: She usually avoids backstroke because doesn't want water in her ears.
counterfactual: After learning the butterfly stroke, she never tries backstroke at all.
original_ending: One day she decides to take backstroke lessons from an expert swimmer. She finds that she loves backstroke and doesn't get water in her ears. From then on, she swims the backstroke constantly.
edited_ending: One day she decides to take breaststroke lessons from an expert swimmer.She finds that she loves breaststroke.From then on, she swims the backstroke constantly.<SEP>One day she decides to take butterfly stroke lessons from an expert swimmer.She finds that she loves butterfly stroke and doesn't get water in her ears.From then on, she swims the butterfly stroke constantly.<SEP>One day she decides to take butterfly lessons from an expert swimmer.She finds that she swims butterfly even faster now.From then on, she swims the butterfly competitively.