import java.io.*;
public class Demo{
public static void main(String[] args)throws Exception{
BufferedReader br = new BufferedReader(new FileReader("D:\\a.txt"));
String lint = null;
while((lint = br.readLine())){
if(lint.indexOf("{a}")){
System.out.println(lint.substring(lint.indexOf("{")+1,lint.indexOf("}")));
}
}
br.close();
}
}
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