#include <bits/stdc++.h>
using namespace std;
int main() {
  int y, m, d;
  scanf("%d/%d/%d", &y, &m, &d);
  vector<int> mo = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  if (y % 400 == 0 || (y % 100 != 0 && y % 4 == 0)) mo[1] = 29;
  d += 2;
  if (d > mo[m - 1]) d -= mo[m - 1], m++;
  if (m > 12) y++, m -= 12;
  printf("%d/%02d/%02d", y, m, d);
}