Shady Char­ac­ters advent calendar 2023: the addiator

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Shady Char­ac­ters advent calendar 2023: the Comptometer

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Shady Char­ac­ters advent calendar 2023: the arithmometer

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Shady Char­ac­ters advent calendar 2023: Chinese counting rods

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Shady Characters advent calendar 2023: the tally stick

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