import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        String regex = "(?:abc\\s*\\(\\s*|\\G(?!^),)('[^',]*'|\\w+\\([^()]*\\))";
        String string = "and abc ( xyz(d.e),'f','g','h','i',abc('p/q'),'r') = u";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(string);
 
        while (matcher.find()) {
            if (null != matcher.group(1)) {
                System.out.println(matcher.group(1));
            }
        }
	}
}

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