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

int days(int y, int m) {
    if (m == 2) {
        if (y % 400 == 0 || y % 100 != 0 && y % 4 == 0) return 29;
        return 28;
    }
    if (m == 4 || m == 6 || m == 9 || m == 11) return 30;
    return 31;
}

int main() {
    int y, m, d;
    scanf("%d/%d/%d", &y, &m, &d);
    int day = days(y, m);
    d += 2;
    if (d > day) {
        d -= day;
        m++;
    }
    if (m == 13) {
        m = 1;
        y++;
    }
    printf("%04d/%02d/%02d\n", y, m, d);
    return 0;
}