I double-click. WinRAR asks for a password.
It extracts a single .txt file. Inside, one line: You are already here. Code Postal new folder 766.rar
I try the obvious: 766 , codepostal , newfolder . Nothing. I try the postal code of places I’ve lived: 75001 , 69003 , 1000 (Brussels). No. The archive breathes quietly, holding its secret. I double-click