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