#include <iostream>


int main() {
    int i = 0, &r = i;
    auto a  = r;
    const int ci = i, &cr = ci;
    auto b = ci;
    auto c = cr;
    auto d = &i;
    auto e = &ci;
    auto &g = ci;

    std::cout << a << " "<< b << " " << c << " " << d << " " << e << " " << g << " "   << std::endl;

    return 0;
}