/* 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
	{
		Pattern p = Pattern.compile("(j?(a?(va)))");
		Matcher m = p.matcher("this is java. this is ava, this is va");
 
		while( m.find() )
		{
			String group = m.group();
			int start = m.start();
			int end = m.end();
			System.out.format("I found the text"
                    + " \"%s\" starting at "
                    + "index %d and ending at index %d.%n",
                    group,
                    start,
                    end);
 
 
 
		}
	}
}

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