#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <map>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    string s;
    cin >> s;

    for (auto& c : s) {
        c -= '0';
    }

    int p[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

    int y, m, d;
    y = s[0] * 1000 + s[1] * 100 + s[2] * 10 + s[3];
    m = s[5] * 10 + s[6];
    d = s[8] * 10 + s[9];

    if (y % 4 == 0 && !(y % 100 == 0 && y % 400 != 0)) p[2] = 29;

    d += 2;
    if (d > p[m]) {
        d -= p[m];
        m++;
        if (m > 12) {
            m -= 12;
            y++;
        }
    }

    printf("%04d/%02d/%02d\n", y, m, d);

    return 0;
}