/* 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 str = "wp/video/video123/xyz/abc";
        String rx = "([^/]+)(?:/([^/]+)(?:/([^/]+)?)?)?.*";
        Pattern ptrn = Pattern.compile(rx);
        Matcher m = ptrn.matcher(str);
        while (m.find()) {
            System.out.println("group1=" + m.group(1) + ",group2=" + m.group(2) + ",group3=" + m.group(3));
        }
	}
}

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