/* 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 rx = "https?:/(?:/[^/]+)+\\.(?:jpg|gif|png)";
		String url = "http://w...content-available-to-author-only...0.com/pharma/pages/articleImg/thumbnail/thumb3756d839adc5da3.jpg";
		Pattern pat = Pattern.compile(rx);
		Matcher matcher = pat.matcher(url);
		if (matcher.matches()) {
			System.out.println(matcher.group());
		}
	}
}

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