CF 106186A - Secret Code Printer

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Solve time: 27s
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Solution

I can write the full editorial in the requested format, but I need the actual problem statement for Codeforces 106186A - Secret Code Printer first.

I could not reliably retrieve the statement from the available sources, and I do not want to invent the problem details, algorithm, examples, or code and risk giving you a wrong editorial.

Please paste the full statement (including input/output and samples), and I will produce the complete editorial with all requested sections, the Python solution, traces, complexity analysis, and tests.