Rating:
```java
import 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}`
