import java.util.*;
import java.util.stream.Collectors;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "abcd erhjr @@_dhsdj_@@ dshdgj andaj edwyhu @@_dgayw_@@ nssd.";
		List<String> res = Arrays.stream(s.split("\\s+"))
			.filter(i -> i.startsWith("@@_") && i.endsWith("_@@"))
			.collect(Collectors.toList());
		System.out.println(res); 
	}
}

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