#include <iostream>
#include <iomanip>
#include <cmath>
#include <cstring>
#include <cstdlib>
#include <string>
#include <vector>
using namespace std;
class point
{
public:
    int x, y;

    void set(int x, int y){
        this->x = x;
        this->y = y;
    }
};
void zero(int w)
{
    if(w >= 10 && w <= 99)
        cout << "0" << w;
    if(w <= 9)
        cout << "00" << w;
    if(w >= 100)
        cout << w;
}
class Fraction{
private:
    int x, y;
    char q, w;
    int q1, q2, w1, w2;
public:
    void read(){
        cin >> q1 >> q >> q2;
        x = q1;
        y = q2;
        cin >> w1 >> w >> w2;
    }
    Fraction(int x = 0, int y = 1){
        this->x=x;
        this->y=y;
    }
    Fraction operator + (const Fraction&s){
        int a, b;
        b=y*(w2);
        a=x*(w2)+(w1)*y;
        return Fraction(a,b);
    }
    void show(){
        cout << x << "/" << y;
    }
};

int main() {
    Fraction a,b, c;
    a.read();
    c = a+b;
    c.show();
    return 0;
}