import java.util.*;
import java.util.regex.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String regex = "%([^%.]+)%|(?<!\\$)\\$(?:\\{([^\\{}]+)\\}|([^$.\\s]+))";
		String string = "%ABC%\n$ABC.\n$ABC$XYZ  ${ABC}\n\n$$EFG $${EFG}.";
		Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
		Matcher m = pattern.matcher(string);
		List<String> results = new ArrayList<>();
		while (m.find()) {
    		results.add(Objects.toString(m.group(1),"") + 
    			Objects.toString(m.group(2),"") + 
    			Objects.toString(m.group(3),""));
		}
    	System.out.println(results);
	}
}

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