投稿者は日本人ですが本暗号問題が英語であるために、あえて英語のテキストとナレーションを付けています。もちろん日本語話者のコメントも歓迎です。If you notice any mistakes or new hints, please let me know in the comments section.Code-breaking, also known as "reconstruction of codebook," is not a lightning bolt that reaches the goal, but rather a slow and steady snowball that grows.Cryptanalysis isn't a solo endeavor. Reconstruction of codebook is best done in groups. If someone is stuck on his/her worksheet, a colleague walking by behind them might provide some inspiration.