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 s = "# #.id\nendpoint/?userId=#someuser.id\nHi #someuser.name, how are you?";
		String regex = "#[^.#]*[^.#\\s][^#.]*\\.\\w+";
		Pattern pattern = Pattern.compile(regex);
		Matcher matcher = pattern.matcher(s);
		while (matcher.find()){
			System.out.println(matcher.group(0)); 
		} 
	}
}