var greeting Welcome to the real world Neo greeting real world matrix

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var greeting = "Welcome to the real world, Neo.";
greeting['real world'] = 'matrix'; // Welcome to the matrix, Neo.
greeting[15 .. 20] = 'Deeptown'; // Welcome to the Deeptown, Neo.
greeting[-1] = #!; // Welcome to the Deeptown, Neo!
greeting[`\sNeo.$`] = 'Leonid!'; // Welcome to the Deeptown, Leonid