import java.util.*;
import java.lang.*;

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String link = "<a href=\"http://w...content-available-to-author-only...k.com/wwwausedu\" target=\"_blank\" class=\"btnFacebook\">Link to Facebook</a>";
        String TEMP = link.substring(link.indexOf("http://")+7, link.indexOf("\"", link.indexOf("http://")));
        System.out.println(TEMP);
	}
}