abstract class SecurityPolicy { // Abstract class defining a required security blueprint
    protected String id; // Attribute identifying the specific policy instance
    
    public SecurityPolicy(String id) { // Constructor for the abstract security policy
        this.id = id; // Initialize the policy ID
    } // End of constructor
    
    public final void logAccess() { // Final method that children CANNOT override/change
        System.out.println("LOG: Access attempt recorded for " + id); // Standard logging logic
    } // End of final method
    
    public abstract boolean validate(String token); // Abstract method for custom validation logic
} // End of SecurityPolicy class

class TokenPolicy extends SecurityPolicy { // Subclass implementing token-based security
    public TokenPolicy(String id) { // Constructor for the TokenPolicy subclass
        super(id); // Pass ID to the parent SecurityPolicy constructor
    } // End of constructor
    
    @Override // Override the abstract validate method
    public boolean validate(String token) { // Logic to validate a token string
        return token != null && token.length() > 5; // Simple rule: token must be > 5 chars
    } // End of validate implementation
} // End of TokenPolicy class

final class EncryptionModule { // Final class that CANNOT be inherited by any other class
    public void encrypt(String data) { // Method to simulate data encryption
        System.out.println("Data encrypted using AES: " + data.hashCode()); // Log hashed result
    } // End of encrypt method
} // End of final EncryptionModule class

public class AbstractFinalContract { // Main class demonstrating modifiers
    public static void main(String[] args) { // Entry point for the contract test
        System.out.println("--- Security Modifier Test ---"); // Print system header
        
        TokenPolicy p = new TokenPolicy("Auth-V1"); // Create a concrete policy object
        p.logAccess(); // Call the final method (standard behavior)
        boolean res = p.validate("secret123"); // Call the custom overridden method
        System.out.println("Validated: " + res); // Print validation result
        
        EncryptionModule em = new EncryptionModule(); // Create instance of the final class
        em.encrypt("UserPassword"); // Call method within the final class
        
        System.out.println("--- Test Complete ---"); // Final exit log for the program
    } // End of main method
} // End of AbstractFinalContract class