If you like a similar problem to scratch that itch there is also the 37 dogs problem. https://www.youtube.com/watch?v=jMxoGqsmk5Y https://www.youtube.com/watch

If you like a similar problem to scratch that itch there is also the 37 dogs problem. https://www.youtube.com/watch?v=jMxoGqsmk5Y https://www.youtube.com/watch?v=jMxoGqsmk5Y - a database whose primary id had a maximum of 6 digits, but the id was encoded as roman numerals.