/* 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 html = "<img src=\"fol der1/mylogo.jpg\" ... />";
		   Pattern pattern = Pattern.compile("src=\"([\\:\\w\\s\\/]+)\\.\\w{3}\"");
			Matcher matcher = pattern.matcher(html);
			while (matcher.find()) {
    			System.out.println("group 1: " + matcher.group(1));
    			System.out.println("src=\"cid:"+matcher.group(1)+"\"");
    			System.out.println("Final Result: "+html.replaceAll("src=\"([\\:\\w\\s\\/]+)\\.\\w{3}\"", "src=\"cid:$1\""));
			}
	}
}

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