Arriving in Kathmandu

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

public class _01_Task {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String reg = "^(?<name>[a-zA-Z0-9!@#$?]+)=(?<length>[0-9]+)<<(?<code>.+)$";
        Pattern p = Pattern.compile(reg);

        String input = "";

        while(!"Last note".equals(input = sc.nextLine())){
            Matcher m = p.matcher(input);

            if (m.find()){
                String name = m.group("name");
                String len = m.group("length");
                int checkLength = Integer.parseInt(len);
                String checkCode = m.group("code");
                if(checkLength == checkCode.length()){
                    StringBuilder sb = new StringBuilder();
                    for (int i = 0; i < m.group("name").length(); i++) {
                        if(Character.isLetterOrDigit(name.charAt(i))){
                            sb.append(name.charAt(i));
                        }
                    }
                    System.out.printf("Coordinates found! %s -> %s%n", sb, checkCode);
                }else{
                    System.out.println("Nothing found!");
                }
            }else{
                System.out.println("Nothing found!");
            }
        }
    }
}