// editor2
#include <iostream>
using namespace std ;
class date{
    public:
    void update(string d,string y,string s,int n){
        int k = stoi (d);
        if(s=="add"){
            cout <<k+n<<"/"<<m<<"/"<<y<<endl;
            }
    else if (s=="subtract"){
        cout<<-n<<"/"<<m<<"/"<<y<<endl;
    }
    else
    {
        cout<<"Invalid input";
        return ;
    }
    }
};
int main (){
    string d,m,y;
    cin>>d>>y;
}string s;
cin>>s;
int n;
cin>>n;
date obj;
obj.update(d,m,y,s,n);
return 0;
    }