Arriving in Kathmandu

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class arriving_in_Kathmandu {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String input = scanner.nextLine();
        String regex = "^(?<name>([!?@#$]*[A-z]*[0-9]*)*)=(?<length>\\d+)<<(?<coordinates>.*)$";
        Pattern pattern = Pattern.compile(regex);

        while(!input.equals("Last note")){

            Matcher matcher = pattern.matcher(input);

            if(matcher.find()){

                String nameRegex = matcher.group("name");
                int length = Integer.parseInt(matcher.group("length"));
                String coordinates = matcher.group("coordinates");

                if(coordinates.length()==length){

                    StringBuilder name = new StringBuilder();

                    for(int i = 0; i < nameRegex.length(); i++){

                        if(Character.isLetter(nameRegex.charAt(i))){

                            name.append(nameRegex.charAt(i));
                        }

                    }

                    System.out.println(String.format("Coordinates found! %s -> %s", name, coordinates));

                }else{

                    System.out.println("Nothing found!");
                }

            }else{

                System.out.println("Nothing found!");

            }

            input = scanner.nextLine();
        }


    }
}