import java.util.*; import java.util.regex.*; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); String s = in.nextLine(); Pattern pattern = Pattern.compile("(\".+?\")|(\\S+)");//懒惰匹配 Matcher match = pattern.matcher(s); List<string> arr = new ArrayList<>(); while(match.find()){ String str = match.group().replaceAll("\"",""); arr.add(str); } System.out.println(arr.size()); arr.stream().forEach(System.out::println); } }</string>