Answer: Secret Code #204

The secret message says:

TORTOISE

Letter by letter

Secret letter	G	H	I	L	R	V
Real letter	T	S	R	O	I	E

Decode it with Python

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

secret = "GLIGLRHV"
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:

TORTOISE