#include <iostream>
using namespace std;
int month[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
int main(){
    int a,b,c;char e;cin>>a>>e>>b>>e>>c;
    if(!(a%4)){
        if(!(!(a%100) && (a%400))){
            month[1]+=1;
        }
    }
    c+=2;
    if(month[b-1] < c){
        b++;
        c-=month[b-2];
    }
    if(12 < b){
        a++;
        b-=12;
    }
    cout << a << e << (b<10?"0":"") << b << e << (c<10?"0":"") << c << endl;
}