/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* 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 INDEX_REGEX = "\\[index='(\\d+)'\\]";
		// your code goes here
		String input = "/interfaces/interface[name='ge-0/0/2']/subinterfaces/subinterface[index='110']/ipv4/addresses/address[ip='10.1.1.2']";
        String indexVal = null;
        Pattern pattern = Pattern.compile(INDEX_REGEX);
        Matcher matcher = pattern.matcher(input);
        if (matcher.find()) {
            indexVal = matcher.group(1);
        }
        System.out.print("Mounica ::: " + indexVal);
 
	}
}

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