#include <bits/stdc++.h>
using namespace std;

bool isLeap(int n) {
  return n % 4 == 0 && !(n % 100 == 0 && n % 400 != 0);
}

int main() {
  int a[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  int y, m, d;
  char c;
  cin >> y >> c >> m >> c >> d;
  if (isLeap(y)) a[2] = 29;
  d += 2;
  if (d > a[m]) {
    d -= a[m];
    m++;
    if (m > 12) {
      y++;
      m = 1;
    }
  }
  cout << y << "/" << setfill('0') << setw(2) << m << "/" << setfill('0')
       << setw(2) << d << endl;
}