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Yumi Seya が「
The Godfather」グループに投稿しました。 12年前 Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)
Yumi Seya が「
The Godfather」グループに投稿しました。 12年前
Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)