```javaimport java.util.Scanner;
class ReverseEngineeringChallenge {    public static void main(String args[]) {        Scanner scanner = new Scanner(System.in);        System.out.print("Enter password: ");        String userInput = scanner.next();        if (checkPassword(userInput)) {            System.out.println("Access granted.");        } else {            System.out.println("Access denied!");        }    }
    public static boolean checkPassword(String password) {        return password.length() == 20 &&                password.charAt(0) == 'f' &&                password.charAt(11) == '_' &&                password.charAt(1) == 'l' &&                password.charAt(6) == '0' &&                password.charAt(3) == 'g' &&                password.charAt(8) == '1' &&                password.charAt(4) == '{' &&                password.charAt(9) == 'n' &&                password.charAt(7) == 'd' &&                password.charAt(10) == 'g' &&                password.charAt(2) == 'a' &&                password.charAt(12) == 'i' &&                password.charAt(5) == 'c' &&                password.charAt(17) == 'r' &&                password.charAt(14) == '_' &&                password.charAt(18) == 'd' &&                password.charAt(16) == '4' &&                password.charAt(19) == '}' &&                password.charAt(15) == 'h' &&                password.charAt(13) == '5';    }}```
Common sense, just put each character in the correct order!
Flag: `flag{c0d1ng_i5_h4rd}`