import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.*;
import java.lang.*;
import java.io.*;
 
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		final String regex = "\\(\\?(?:,\\?)+\\)";
		final String string = "(?,?)";
 
		final Pattern pattern = Pattern.compile(regex);
		final Matcher matcher = pattern.matcher(string);
 
		if (matcher.find()) {
		    System.out.println(matcher.group(0));
		}
	}
}

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