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Originally posted by TrustMeIKnow
Example: After pressing the esc key the first letter will be, say, a "P". The second letter will then be a "T"
Originally posted by Ian McLean
Hints
1. There are 25 letters in the ciphertext alphabet.
2. There are 18 letters in the solution.
3. Don't be distracted by the lights.
4. The puzzle title contains a key piece of information.