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
	{
		String regex = "\\[(?:\\d+,\\h+)*(\\d+)]";
		String string = "[72, 216, 930],[250],[72],[228, 1539],[12]";
 
		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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