//Normal

#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

void print(auto a){
  cout << a;
}

void prints(auto a){
  cout << a << " ";
}

void prints(){
  cout << " ";
}

void printl(auto a){
  cout << a << endl;
}

void printl(){
  cout << endl;
}

void fix(int n){
  cout << fixed << setprecision(n);
}

int main(){
  string S; cin >> S;
  int Y = stoi(S.substr(0, 4));
  int M = stoi(S.substr(5, 7));
  int D = stoi(S.substr(8, 10)) + 2;
  
  bool uruu = false;
  if(Y%400 == 0 or (Y%4 == 0 and Y%100 != 0)) uruu = true;
  
  vector<int> mon = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  if(uruu) mon[2]++;
  
  if(mon[M] < D){
    D -= mon[M];
    M++;
  }
  if(12 < M){
    Y++;
    M = 1;
  }
  
  printf("%04d/%02d/%02d\n", Y, M, D);
  
  return 0;
}