include

include

using namespace std;

class Complex { public: int a, b; friend ostream& operator << (ostream& os, Complex obj); friend Complex operator + (Complex& a_obj, Complex& b_obj); };

ostream& operator << (ostream& os, Complex obj) { os << obj.a << "+i" << obj.b; return os; }

Complex operator + (Complex& a_obj, Complex& b_obj) { Complex c_obj; c_obj.a = a_obj.a + b_obj.a; c_obj.b = a_obj.b + b_obj.b; return c_obj; }

void call_complex(string& s, int& a, int& b) { int num = 0; int i = 1; for (auto x : s) { if (x == '+') { continue; } else if (x == 'i') { a = num; num = 0; i = 1; continue; } num = num * i + (x - 48); i = 10; } b = num; }

int main() {

int a, b;
string s;

getline(cin, s);
call_complex(s, a, b);

Complex obj1{a, b};

getline(cin, s);
call_complex(s, a, b);

Complex obj2{a, b};

Complex obj3 = obj1 + obj2;
cout << obj3 << endl;

return 0;

}