#include <iostream>

 int main(){

   std::cout << std::endl;

   enum Colour{red= 0,green= 2,blue};

   std::cout << "red: " << red << std::endl;
   std::cout << "green: " << green << std::endl;
   std::cout << "blue: " << blue << std::endl;

   int red2= red;

   std::cout << "red2: " << red2 << std::endl;

   // int red= 5;  ERROR

   std::cout << std::endl;


 }