Answer: Secret Code #234

The secret message says:

MEOW!

Letter by letter

Secret letter	D	L	N	V
Real letter	W	O	M	E

Decode it with Python

This program does the decoding for you. Change the secret and the code to crack other messages!

secret = "NVLD!"
message = ""

for letter in secret:
    if letter.isalpha():
        position = ord(letter) - ord("A")
        message = message + chr(ord("Z") - position)
    else:
        message = message + letter

print(message)

When you run it, it prints:

MEOW!