include iostream using namespace std class fraction private long long

#include<iostream>
using namespace std;
class fraction{
private:
    long long int a,b;
public:

    friend ostream &operator<<(ostream &potok , const fraction &f);

    friend istream &operator>>(istream &potok , fraction &f);

    fraction(long long int a = 0, long long int b = 1)
    {
        this->a = a;
        this->b = b;
    }
    void show()
    {
        cout << a << '/' << b;
    }
    void read()
    {
        char c;
        cin >> a >> c >> b;
    }
    fraction operator+(fraction other){
        return fraction(b *  other.a + a * other.b, b * other.b);
    }
};

ostream &operator<<(ostream &potok , const fraction &f){
    potok << f.a << "/" << f.b << endl;
    return potok ;
}
istream &operator>>(istream &potok , fraction &f){
    potok >> f.a >> f.b;
    return potok ;
}
int main(){
    fraction x,y;
    cin >> x >> y;
    cout << (x + y);
    return 0;
}