import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String searchText = "abcd erhjr @@_dhsdj_@@ dshdgj andaj edwyhu @@_dgayw_@@ nssd.";
		List<String> result = new ArrayList<>();
		Matcher m = Pattern.compile("@@_\\S*?_@@").matcher(searchText);
		while (m.find()) {
			result.add(m.group(0));
		}
		System.out.println(result); 
	}
}

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