#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int y, m, d;
  scanf("%d/%d/%d", &y, &m, &d);
  d += 2;
  vector<int> days = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
  if (y % 4 == 0 && y % 100 != 0 || y % 400 == 0) days[1]++;
  if (d > days[m - 1]) {
    d -= days[m - 1];
    m++;
  }
  if (m > 12) {
    m -= 12;
    y++;
  }
  printf("%d/%02d/%02d\n", y, m, d);
  return 0;
}