Please send the challenge you created (packed within a single zip file) to the following address:

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The zip file should contain the following:

• a challenge description (text document is sufficient, we take care of the formatting),
• a cipher text,
• a solution (solution phrase) to be used for automatic feedback to the participating solvers,
• a suggestion for the level your challenges should be part of,
• a suggestion to the maximal number of tries, as well as
• the name of the author of the challenge (optional).