UCEED 2022

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UCEED2022Q4·nat·Hard132 attempts

Shown below is a book shelf that has a kid's adventure novel in a book series of 9 volumes. The spines (binding side) of these books contain parts of a treasure map. What is the sequence of the books that forms the completed treasure map? Enter the answer as a single nine-digit integer.

Keyboards off — use the numpad, just like on exam day.