/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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 block = "\\w+\\(\\?*\\w+(?:,\\?*\\w+)?\\)";
		String pat = "(" + block + ")(," + block + ")*";
		List<String> strs = Arrays.asList("a(b)", "a(?v)", "a(b),c(?c,a)");
		for (String str : strs) {
			Matcher m = Pattern.compile(pat).matcher(str);
			while (m.find()) {
				System.out.println(m.group(0));
			}
		}
	}
}

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