import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
 
/* 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 regex = "(?s)^.*(\\s(?<!\\d.)(?=\\d)|\\s(?<=\\d.)(?!\\d|\\s*$)|\\s(?<=[^\\d\\s].)(?=[^\\d\\s]))";
        String string = "jumnsch@domain.com m 5180-3807-3679-8221 612 3/1/2010\n\n"
                + "hello this card number 4444 5555 6666 7777\n\n"
                + "hello this bob";
 
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(string);
 
        if (matcher.find()) {
            System.out.println("[" + matcher.group(1) + "]");
            System.out.println(matcher.start(1));
        }
	}
}

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