import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
public static void main(String args[]) {
String regex = "(\\w++)(\\d\\d)(\\w+)";
Pattern pattern = Pattern.compile(regex);
String candidate = "X99 test 55";
Matcher matcher = pattern.matcher(candidate);
if (matcher.find()) {
System.out.println("GROUP 0:" + matcher.group(0));
System.out.println("GROUP 1:" + matcher.group(1));
System.out.println("GROUP 2:" + matcher.group(2));
System.out.println("GROUP 3:" + matcher.group(3));
} else {
System.out.println("NO MATCHES");
}
}
}