#include <iostream>
#include <cmath>
#include <vector>
#include <string>
#include <map>
#include <algorithm>
#include <numeric>
#include <fstream>
#include <iomanip>

typedef long double ld;
typedef long long ll;
const ll INF = (ll)1e18 + 1;
const ll MOD = 1e9 + 7;

// Split
namespace util {

std::vector< std::string > split(std::string s, char delimiter)
{
  std::vector< std::string > vs;
  std::string sub;
  for (auto c : s) {
    if (c == delimiter) vs.push_back(sub), sub.clear();
    else sub += c;
  }
  vs.push_back(sub);
  return vs;
}

} // namespace util

// Minimum, Maximum
template<class T> T minimum(T head, T tail) { return std::min(head, tail); }
template<class H, class... T> H minimum(H head, T... tail) { return std::min(head, minimum(tail...)); }
template<class T> T maximum(T head, T tail) { return std::max(head, tail); }
template<class H, class... T> H maximum(H head, T... tail) { return std::max(head, maximum(tail...)); }

// Output
template<class T, class S> std::ostream& operator << (std::ostream& os, std::pair<T, S> p)
{
  return os << p.first << " " << p.second;
}

template<class T> std::ostream& operator << (std::ostream& os, std::vector< T > v)
{
  for (ll i = 0; i < (ll)v.size(); i++){ os << " [" << i << "]" << v[i]; if (i % 10 == 9) os << std::endl; }
  return os;
}

template<class T, class S> std::ostream& operator << (std::ostream& os, std::vector< std::pair<T, S> > vp)
{
  ll i = 0;
  for (auto p : vp){os << " [" << i++ << "]" << p.first << " " << p.second; if (i % 10 == 0) os << std::endl;}
  return os;
}

void print(){ std::cout << std::endl; }
template<typename H> void print(H head) { std::cout << head << std::endl; }
template<typename H, typename... T> void print(H head, T... tail){ std::cout << head << " ", print(tail...); }

ll get_day_num_of_month(ll year, ll month)
{
  ll day_num = 31;
  if (month == 4 || month == 6 || month == 9 || month == 11) {
    day_num = 30;
  } else if (month == 2) {
    day_num = (year % 400 == 0 || (year % 100 != 0 && year % 4 == 0)) ? 29 : 28;
  }

  return day_num;
}

int main()
{
  std::cin.tie(nullptr);
  std::ios::sync_with_stdio(false);

  std::string S;
  std::cin >> S;

  std::string y = S.substr(0, 4);
  std::string m = S.substr(5, 2);
  std::string d = S.substr(8, 2);

  ll year  = std::atoll(y.c_str());
  ll month = std::atoll(m.c_str());
  ll day   = std::atoll(d.c_str());

  ll day_num = get_day_num_of_month(year, month);

  ll ans = day + 2;
  if (ans > day_num) {
    ans  -= day_num;
    year  = month != 12 ? year : year + 1;
    month = month != 12 ? month + 1 : 1;
  }

  std::cout << std::setfill('0') << std::setw(4) << year  << "/";
  std::cout << std::setfill('0') << std::setw(2) << month << "/";
  std::cout << std::setfill('0') << std::setw(2) << ans   << std::endl;

  return 0;
}