The Alan Turing Cryptography Competition

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Chapter 4

You'll have to get your paper out for this one and no sitting on the fence with the answer to the question? Have you seen any trains on the rails recently?


Above is the image attached to Mike's message. When decoded, it is a question. You must find the answer and type it into the box below.

This problem was first solved on Mon 8th February at 4:08:05pm
Alan Turing Cryptography Competition 2021 is organised by the The Department of Mathematics at The University of Manchester.
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