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

int m[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int daymonth(int year, int month){
  if (month != 2) return m[month-1];
  else {
    bool flag = false;
    if (year % 4 == 0) flag = true;
    if (year % 100 == 0) flag = false;
    if (year % 400 == 0) flag = true;
    return m[month-1] + flag;
  }
}

int main(){
  int y, m, d;
  scanf("%d/%d/%d", &y, &m, &d);
  d += 2;
  if (d > daymonth(y, m)) {
    d -= daymonth(y, m); m++;
  }
  if (m > 12) {
    m -= 12; y++;
  }
  printf("%d/%02d/%02d\n", y, m, d);
  return 0;
}