Instructions

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Acknowledgments
Game: I do not remember who taught me this game. It was 2004 (plus minus 2 years). It is either one of my parents or primary school friends... Whoever that is, thanks.
Code: I never liked coding front-end, so the interface (and most of the code) is taken from this website: Engaging Data WordGuessr.
Inspiration: I saw Wordle has become super popular on Twitter (hey, you can follow me), so I thought people may enjoy this game, too. And yes, I am not very creative when it comes to naming things.
Predecessors: Jan Ruscoe told me this is a (generalized) version of the board game Mastermind. According to Wikipedia, a much older version was called Bulls and Cows.