/* 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 input = "Passage : Hi David! how are you? are you in chennai now? "
                + "\n Hi Ram! how are you?\n are you in chennai now?";
        String regex1="Hi\\s+(.*?)\\s+how\\s+are\\s+you\\?\\s+are\\s+you\\s+in\\s+(.*?)\\s+now\\?";
        Pattern p = Pattern.compile(regex1,Pattern.DOTALL);
        Matcher m = p.matcher(input);
 
        StringBuffer result = new StringBuffer();
        while (m.find()) {
            m.appendReplacement(result,m.group(1)+" is fine and yes I am in "+m.group(2));
        }
         m.appendTail(result);
        System.out.println(result);
	}
}

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