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

int main() {
    int day[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int y, m, d;
    scanf("%d/%d/%d", &y, &m, &d);
    
    if (y % 400 == 0) {
        day[2]++;
    } else if (y % 100 != 0 and y % 4 == 0) {
        day[2]++;
    }
    
    d += 2;
    if (day[m] < d) {
        d = (d % day[m]);
        m++;
        if (m == 13) { m = 1; y++; }
    }
    
    cout << y << '/';
    if (m < 10) cout << '0';
    cout << m << '/';
    if (d < 10) cout << '0';
    cout << d << '\n';
    
    return 0;
}