/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String regex = "(?:\"(?=.*\"$)|\\G(?!^))(~?@\\w+(?:,~?@\\w+)*)\"?[,\\h]?";
		String string = "\"@smoke\"\n"
			 + "\"@smoke,@Functional1\"\n"
			 + "\"@smoke,@Functional1,@Functional2\"\n"
			 + "\"@smoke\",\"@Functional1\"\n"
			 + "\"@smoke\",\"~@Functional1\"\n"
			 + "\"~@smoke\",\"~@Functional1\"";
 
		Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
		Matcher matcher = pattern.matcher(string);
 
		while (matcher.find()) {
		    System.out.println(matcher.group(1));
		}
	}
}

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