#include <bits/stdc++.h>
using namespace std;
bool leap(int year) {
    if (year % 100 == 0 && year % 400 != 0) return false;
    return year % 4 == 0;
}
int main() {
    // Input
    int y, m, d;
    scanf("%d/%d/%d", &y, &m, &d);

    // Calculation
    int day[13] = {0, 31, leap(y) ? 29 : 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    d += 2;
    if (d > day[m]) {
        d -= day[m];
        ++m;
        if (m > 12) {
            m = 1;
            ++y;
        }
    }

    // Output
    printf("%02d/%02d/%02d", y, m, d);
}