import java.util.*;
import java.lang.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
 
class Main
{
        public static void main (String[] args) throws java.lang.Exception
        {
			Pattern pattern = Pattern.compile("!\\[(.*?)*\\]");
			String test = "![][][]";
			Matcher matcher = pattern.matcher(test);
			while (matcher.find()) {
			   System.out.println(matcher.group(1));
			}
        }
}