#include<iostream>
#include<iomanip>

using namespace std;

int uruu(int y) {
    if (y % 4 == 0) {
        if (y % 100 == 0) {
            if (y % 400 == 0) {
                return 1;
            }
            return 0;
        }
        return 1;
    }
    return 0;
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    string tmp;
    cin >> tmp;
    int m, d, y;
    d = stoi(tmp.substr(8, 2));
    m = stoi(tmp.substr(5, 2));
    if (d <= 26 || (d <= 27 && m != 2)) {
        cout << tmp.substr(0, 8);
        cout << setw(2) << setfill('0') << d + 2 << endl;
    }
    y = stoi(tmp.substr(0, 4));
    if (m != 12) {
        int nd = (d + 2) % (m == 2 && uruu(y) == 1 ? 29 + 1 : days[m - 1] + 1);
        if (nd > d) {
            cout << tmp.substr(0, 8);
            cout << setw(2) << setfill('0') << d + 2 << endl;
        } else { //月が変わる
            nd++;
            cout << tmp.substr(0, 5);
            cout << setw(2) << setfill('0') << m + 1;
            cout << "/";
            cout << setw(2) << setfill('0') << nd << endl;
        }
    } else {
        int nd = (d + 2) % (days[m - 1] + 1);
        if (nd > d) {
            cout << tmp.substr(0, 8);
            cout << setw(2) << setfill('0') << d + 2 << endl;
        } else { //年が変わる
            nd++;
            cout << setw(4) << setfill('0') << y + 1;
            cout << "/01/";
            cout << setw(2) << setfill('0') << nd << endl;
        }
    }
}