#include <iostream>
 
typedef std::ostream& (*manip) (std::ostream&);
 
class console {
 
};
 
template <class T> console& operator<< (console& con, const T& x) { std::cout << x; return con; }
template <class T> console& operator>>(console& con,  T& x) { std::cin >>x; return con; }
console& operator<< (console& con, manip manipulator){ std::cout<<manipulator; return con;}
 
int main() {
    console c;
    int a,b;
    c>>a>>b;
    c << "hello world"<<std::endl<<std::hex<<(a+b)<<std::endl;
}

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