Explore Challenges
M-138 — Part 4 Level 2
by K. Schmeh, published on 2014-12-23
This is part 4 in a series about the M-138. Part 4 is a ciphertext-only challenge (75 letters).
This is part 4 in a series about the M-138. Part 4 is a ciphertext-only challenge (75 letters).