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

int days[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int Y, M, D;

void tomorrow(int &y, int &m, int &d)
{
    d++;
    if (d > days[m])
    {
        d = 1;
        m++;
        if (m > 12)
        {
            y++;
            m = 1;
        }
    }
}

int main()
{
    string s;
    cin >> s;
    sscanf(s.c_str(), "%d/%d/%d", &Y, &M, &D);
    if (Y % 4 == 0 && !(Y % 100 == 0 && Y % 400 != 0))
        days[2] = 29;
    tomorrow(Y, M, D);
    tomorrow(Y, M, D);

    printf("%04d/%02d/%02d\n", Y, M, D);
}