/* 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 s = "https://a...content-available-to-author-only...s.com/somestring/somestring-2/c100.200.3.4/somestrigx3/somestring.4";
		Pattern pattern = Pattern.compile("(?<=/c)(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)");
		Matcher matcher = pattern.matcher(s);
		if (matcher.find()){
       		System.out.println(matcher.group(1));
	        System.out.println(matcher.group(2)); 
	        System.out.println(matcher.group(3));
	        System.out.println(matcher.group(4));
		}
	}
}

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